WO2012165327A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2012165327A1
WO2012165327A1 PCT/JP2012/063467 JP2012063467W WO2012165327A1 WO 2012165327 A1 WO2012165327 A1 WO 2012165327A1 JP 2012063467 W JP2012063467 W JP 2012063467W WO 2012165327 A1 WO2012165327 A1 WO 2012165327A1
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WO
WIPO (PCT)
Prior art keywords
basis weight
groove
absorbent
weight portion
absorbent article
Prior art date
Application number
PCT/JP2012/063467
Other languages
English (en)
Japanese (ja)
Inventor
剛大 石川
加藤　隆弘
長原　進介
宙夫 安田
裕美 立川
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 JP2011118621A external-priority patent/JP5552091B2/ja
Priority claimed from JP2011198000A external-priority patent/JP5604393B2/ja
Priority claimed from JP2011209339A external-priority patent/JP5779464B2/ja
Priority claimed from JP2012088729A external-priority patent/JP2013009946A/ja
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201280025811.6A priority Critical patent/CN103561703B/zh
Priority to KR1020137029829A priority patent/KR101894122B1/ko
Publication of WO2012165327A1 publication Critical patent/WO2012165327A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—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
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
    • A61F13/4756—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means consisting of grooves, e.g. channels, depressions or embossments, resulting in a heterogeneous surface level
    • 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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15617—Making absorbent pads from fibres or pulverulent material with or without treatment of the fibres
    • A61F13/15658—Forming continuous, e.g. composite, fibrous webs, e.g. involving the application of pulverulent material on parts thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/531—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad
    • A61F13/532—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad
    • A61F13/5323—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having a homogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad having absorbent material located in discrete regions, e.g. pockets

Definitions

  • an absorbent article such as a sanitary napkin
  • an absorbent body including a topsheet, a backsheet, and a liquid-retaining absorbent core interposed between both sheets
  • a substantially vertically long article is known.
  • the present applicant has previously proposed an absorbent article provided with a back sheet made of a moisture permeable sheet having a predetermined moisture permeability in order to effectively reduce the humidity in the wearing during use of the absorbent article. (See Patent Document 4).
  • the humidity in the clothes is effectively reduced, there is less discomfort such as swelling and stickiness, and there is a comfortable texture, and skin troubles such as kayumi and burring are caused. Difficult to develop.
  • FIG. 5 is a cross-sectional view schematically showing a cross section taken along line III-III in FIG.
  • FIG. 6 is a cross-sectional view schematically showing a cross section taken along line IV-IV in FIG.
  • FIG. 7 is a schematic cross-sectional view of an embodiment of a method for manufacturing the absorbent body (absorbent core) shown in FIG. 3 and a manufacturing apparatus used therefor.
  • FIG. 8 is a schematic cross-sectional view along the width direction of a part (concave portion) on the outer peripheral surface side of the rotating drum shown in FIG.
  • FIG. 9 is a schematic cross-sectional view showing a state where an absorbent material is deposited in the concave portion of the rotating drum shown in FIG.
  • FIG. 10 is an explanatory diagram of the compression process of the deposit.
  • FIG. 11 is an explanatory diagram of a method for evaluating air permeability by the Gurley tester method.
  • FIG. 12 is a partially cutaway perspective view showing a sanitary napkin as an embodiment of the absorbent article of the present invention (second invention) from the skin contact surface side.
  • 13 is a cross-sectional view schematically showing a cross section taken along line II of FIG. Fig. 14 (a) is a plan view showing the absorbent core used in the sanitary napkin in Fig. 12 from the skin contact surface side, and Fig. 14 (b) is a part of Fig. 14 (a). It is a top view which expands and shows (the part enclosed with the circle).
  • FIG. 15 is a cross-sectional view schematically showing a cross section taken along line II-II in FIG. FIG.
  • the napkin 1 ⁇ / b> A of this embodiment includes a top sheet 2 disposed on the skin contact surface side, a back sheet 3 disposed on the non-skin contact surface side, and both sheets 2. 4A is provided, and is vertically long (long shape in one direction).
  • the napkin 1 ⁇ / b> A is disposed on the abdomen side of the wearer with respect to the excretory part facing part 11 disposed opposite to the excretion part (vaginal opening) of the wearer at the time of wearing.
  • the skin contact surface is a surface of the absorbent article or a component thereof that faces the wearer's skin when the absorbent article is mounted, and the non-skin contact surface is the absorbent article.
  • the surface of the member is directed to the side opposite to the skin side (clothing side) when the absorbent article is mounted.
  • a longitudinal direction is a direction along the long side of an absorbent article or its structural member, and a width direction is a direction orthogonal to this longitudinal direction.
  • the direction indicated by the symbol X is the longitudinal direction of the absorbent article (absorber, absorbent core)
  • the direction indicated by the symbol Y is the width direction of the absorbent article (absorber, absorbent core).
  • the low basis weight portion 42 (42X, 42Y) and the skin contact surface 4a in the thickness direction T of the absorbent core 40A and the non-skin You may be unevenly distributed in the approximate center part with the contact surface 4b.
  • the high basis weight portion 41 protrudes in the thickness direction T on the skin contact surface 4a side and the non-skin contact surface 4b side. Therefore, in the absorbent core 40A in which the low basis weight portion 42 is unevenly distributed in the approximate center between the skin contact surface 4a and the non-skin contact surface 4b, the skin contact surface 4a and the non-skin contact surface 4b respectively.
  • the pair of longitudinal grooves 7X and 7X extend over the entire length in the longitudinal direction X of the excretory part facing part 11 at the left and right side parts along the longitudinal direction X of the absorbent core 40A, and further, the front part 12 and the rear part 13 also extends to each.
  • the lateral groove 7Y1 is formed in the front part 12, and the lateral groove 7Y2 is formed in the rear part 13, respectively.
  • Both lateral grooves 7Y1 and 7Y2 are formed to include a horizontally long shape that is convexly convex outward in the longitudinal direction X in plan view, and the tops of the protrusions of both lateral grooves 7Y1 and 7Y2 have a width of Located in the center of the direction Y.
  • the groove 7 (7X, 7Y1, 7Y2) can be formed in accordance with an ordinary method by embossing such as embossing with or without heat, or ultrasonic embossing. That is, in the manufacturing process of the napkin 1A, after supplying the topsheet 2 on one surface of the absorber 4A (absorbent core 40A having an uneven structure), a predetermined portion is moved from the topsheet 2 side to the absorber 4A side by embossing.
  • the groove 7 can be formed in the predetermined portion by pressing (squeezing) in a concave shape.
  • the top sheet 2 and the absorbent body 4 ⁇ / b> A are integrated by heat fusion or the like.
  • Each of both side portions along X includes a vertically long shape that is convexly curved outward in the width direction Y of the napkin 1A.
  • the low basis weight portion 42X of the absorbent core 40A is formed in a linear shape that completely coincides with the longitudinal direction X of the absorbent core 40A, while the longitudinal groove 7X is completely different from the longitudinal direction X.
  • the vertical grooves 7X are easily formed so as to straddle the irregularities of the absorbent core 40A continuous in the longitudinal direction X.
  • the groove 7 (7X, 7Y1, 7Y2) is defined by a bottom wall portion 71 and a side wall portion 72 standing from the bottom wall portion 71, as shown in FIGS.
  • the bottom wall portion 71 that defines the groove 7 is less than the center Tc in the thickness direction of the absorbent core 40 ⁇ / b> A in both the high basis weight portion 41 and the low basis weight portion 42. It is located on the skin contact surface 4b side.
  • the thickness direction center Tc is the center of the apparent thickness of the absorbent core 40A having the uneven structure.
  • channel 7 obtained after the said pressing ie, the groove
  • the absorbent core 40A deposits an absorbent material so as to have a high basis weight portion 41 and a low basis weight portion 42 to obtain a deposit having an uneven structure
  • the high basis weight portion 41 as a convex portion is more likely to be a non-convex portion or a concave portion. Since it is compressed more strongly than the low basis weight portion 42, the high basis weight portion 41 (site C) has a higher density than the low basis weight portion 42 (site B).
  • the napkin 1A of the present embodiment has a concavo-convex structure formed by a high basis weight part (convex part) 41 and a low basis weight part (non-convex part or concave part) 42 as an absorbent core in which the grooves 7 are formed.
  • the absorbent core 40A it is possible to solve the above-mentioned problem ii) that the absorbent article employing the conventional combination of a flat absorbent core without unevenness and a leak-proof groove has, and the absorbent body 4A ( Despite the formation of the high-density grooves 7 in the absorbent core 40), the absorber 4A is hardly cured and has excellent fit. As shown in FIG.
  • the excretory fluid W such as menstrual blood excreted by the wearer of the napkin 1A is usually facing the excretory part It is received at the center in the width direction Y of the portion 11 and moves in the width direction Y from the skin contact surface (skin contact surface 2a of the topsheet 2) toward the groove 7 (vertical groove 7X), for example, FIG.
  • the excretory liquid W that has reached the part B is a groove in the high basis weight portion 41 due to capillary force. 7 easily moves to a part C that is in the vicinity of 7 and hardly stays in the part B.
  • the excretion liquid W moves in the front-rear direction of the napkin 1A along the groove 7 in the vicinity of the groove 7 and inward in the width direction Y from the groove 7, and quickly from the excretion part facing part 11 in the longitudinal direction X. To spread.
  • the excretory liquid W is quickly absorbed and held by the high basis weight portion 41 while moving from the portion B to the portion C in the vicinity of the groove 7 and inward in the width direction Y from the groove 7.
  • the portion exceeding the absorption capacity of the portion E is located in the portion E (the bottom wall portion 71 that defines the groove 7 in the high basis weight portion 41) located outside the portion C in the width direction Y.
  • the site E is the most compressed site when the groove 7 is formed, and the density thereof is overwhelmingly higher than the site C adjacent to the width direction Y. Therefore, the excretion fluid W moves from the site E to the site C. Therefore, it is unlikely that the excretion liquid W moves beyond the groove 7 to the outside in the width direction Y of the napkin 1A.
  • the excretion fluid W that has moved to the site E via the site C passes through the groove 7 without leaking to the outside of the groove 7, and is adjacent to the site D (the bottom wall that defines the groove 7 in the low basis weight portion 42. Part 71) and further to another part E adjacent thereto.
  • the excretory fluid W moving in the groove 7 is absorbed and held mainly by the high basis weight portion 41 during the movement.
  • the napkin 1A of the present embodiment can quickly diffuse and absorb the excreted excreta by the diffusion / absorption action of the excretory liquid by the cooperation of the absorber 4A (absorbent core 40A) and the groove 7, It is difficult to cause side leakage and can eliminate discomfort caused by the wetness of the wearer. From the viewpoint of ensuring the operational effects of the napkin 1A, it is preferable to set the dimensions and the like of the respective parts as follows.
  • the ratio (S41 / S42) of the basis weight S41 of the high basis weight portion 41 and the basis weight S42 of the low basis weight portion 42 of the absorbent core 40A is preferably 1.25 or more, more preferably 3 or more, and preferably Is 10 or less, more preferably 6 or less.
  • the basis weight S41 of the high basis weight portion 41 is preferably 100 g / m 2 or more, more preferably 150 g / m 2 or more, and preferably 600 g / m 2 or less, more preferably 500 g / m 2 or less.
  • the size of the high basis weight portion 41 in a plan view as shown in FIG. 3A differs depending on the type and use of the absorbent article, but in a sanitary napkin such as the napkin 1A, the length L2 in the longitudinal direction X (See FIG. 3A) is preferably 5 mm or more, more preferably 10 mm or more, and preferably 50 mm or less, more preferably 30 mm or less, and a length L3 in the width direction Y (see FIG. 3A). ) Is preferably 3 mm or more, more preferably 5 mm or more, and 30 mm or less, more preferably 20 mm or less.
  • the number of high basis weight portions 41 is preferably 5 or more, more preferably 10 or more, and preferably 70 or less, more preferably 60 or less per 50 cm 2 area.
  • channel 7 mentioned above may be measured using a ruler etc. with the naked eye, Preferably, it measures using a digital microscope.
  • the groove 7 can be enlarged and photographed using a digital microscope VHX-1000 manufactured by KEYENCE, and the dimensions of each part can be measured.
  • the width L5 of the groove 7 is measured at the bottom surface of the groove 7.
  • the depth L6 of the groove 7 is obtained by measuring the cross section of the groove 7 with a digital microscope.
  • the top sheet 2 and the back sheet 3 various materials conventionally used in the technical field can be used without particular limitation.
  • the surface sheet 2 for example, a liquid-permeable sheet such as a nonwoven fabric or an apertured film can be used.
  • the back sheet 3 for example, a resin film that does not have moisture permeability, a resin film that has micropores and has moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, a laminate of these and other sheets, and the like are used. Can do.
  • seat 5 the various things conventionally used in the said technical field can be especially used without a restriction
  • an absorptive material which is a forming material of the absorptive core 40A
  • various materials conventionally used in the technical field can be used without particular limitation.
  • natural materials such as wood pulp, cotton, hemp and the like can be used as fiber materials.
  • Fibers synthetic fibers made of synthetic resins such as polyethylene and polypropylene; semi-synthetic fibers such as acetate and rayon can be used. Further, in addition to these fiber materials, water-absorbing polymers of various shapes such as particles can be used as the absorbent material.
  • FIG. 7 shows an embodiment of a method for manufacturing the absorbent body 4A and a manufacturing apparatus used therefor.
  • the absorber manufacturing apparatus includes a rotating drum 50 that is rotationally driven in the direction of arrow R1, a duct 60 that supplies the absorbent material 45, which is a raw material of the absorbent core 40A, to the outer peripheral surface of the rotating drum 50, and the rotating drum 50
  • a transfer roll 70 disposed obliquely below and rotated in the direction of arrow R2
  • a vacuum box 65 disposed between the duct 60 and the transfer roll 70 in the circumferential direction of the rotary drum 50
  • a vacuum box 65 and the rotary drum 50 and a mesh belt 75 which is a sheet-like breathable member, disposed so as to pass between the transfer roll 70 and the rotary drum 50
  • a vacuum conveyor 80 disposed below the transfer roll 70.
  • the rotating drum 50 has a cylindrical shape, and receives power from a motor such as a motor, and the members forming the outer peripheral surface rotate around the horizontal axis.
  • a space 56 capable of depressurizing the inside is formed in a non-rotating portion on the inner side (rotating shaft side) of the rotating drum 50.
  • a known exhaust device such as an intake fan is connected to the space 56, and the interior of the space 56 can be maintained at a negative pressure by operating the exhaust device.
  • piping capable of taking in air outside the apparatus is connected to the spaces 57 and 58 on the inner side (rotating shaft side) of the rotating drum 50.
  • a concave portion 51 having a shape corresponding to the shape of the absorbent core 40A to be manufactured is formed on the outer peripheral surface of the rotary drum 50.
  • a large number of pores are formed in the bottom surface portion 52 of the recess 51, and the pores of the bottom surface portion 52 of the recess 51 absorb while the recess 51 passes over the space 56 maintained at a negative pressure. It functions as a suction hole for the conductive material 45.
  • the left and right side portions of the outer peripheral surface of the rotating drum 50 in which the recess 51 is not formed are made of a frame body of the rotating drum 50 made of a metal rigid body and are non-breathable.
  • each partition member 53 is made of a non-breathable plate member.
  • the inside of the recess 51 is partitioned into a plurality of regions 54 corresponding to the plurality of high basis weight portions 41 in the absorbent core 40A described above by a plurality of partition members 53.
  • the shape of each partitioned region 54 in plan view is the same shape (rectangular shape) as that of the high basis weight portion 51 in plan view.
  • the height of the partition member 53 protruding from the bottom surface 52 is shorter than the depth of the recess 51.
  • one end side of the duct 60 covers the outer peripheral surface of the rotary drum 50 positioned on the space 56 maintained at a negative pressure, and the other end side (not shown) has a fiber material introduction device.
  • the fiber material introducing device includes, for example, a pulverizer that pulverizes sheet-like wood pulp into defibrated pulp and feeds the defibrated pulp (fiber material) into a duct.
  • a water-absorbing polymer introduction part that introduces the water-absorbing polymer may be provided in the middle of the duct 60.
  • the transfer roll 70 has a cylindrical outer peripheral portion having air permeability, and the outer peripheral portion rotates around a horizontal axis upon receiving power from a motor such as a motor.
  • a space 71 that can be depressurized is formed in the non-rotating portion on the inner side (rotating shaft side) of the transfer roll 70.
  • a known exhaust device such as an intake fan is connected to the space 71, and the interior of the space 71 can be maintained at a negative pressure by operating the exhaust device.
  • the vacuum box 65 is disposed between the downstream end 61 of the duct 60 and the transfer roll 70 in the rotation direction R1 of the rotary drum 50.
  • the vacuum box 65 has a box-like shape having upper and lower surfaces, left and right side surfaces, and a back surface, and has an opening that opens in the direction of the rotary drum 50 at a portion facing the back surface.
  • the vacuum box 65 is connected to a known exhaust device (not shown) such as an intake fan via an exhaust pipe 61, and the inside of the vacuum box 65 can be maintained at a negative pressure by the operation of the exhaust device. .
  • the mesh belt 75 is a sheet-like breathable member, which is a belt-shaped breathable belt having a mesh connected in an endless manner, and is guided by a plurality of free rolls and transfer rolls 70 so as to continue a predetermined path. Move on.
  • the mesh belt 75 is driven by the rotation of the transfer roll 70.
  • the mesh belt 75 is introduced between the vacuum box 65 and the rotary drum 50 and the transfer roll after being introduced onto the outer peripheral surface of the rotary drum 50 in the vicinity of the downstream end portion 61 of the duct 60. 70 and the rotating drum 50 are arranged so as to pass sequentially.
  • the mesh belt 75 passes in front of the opening of the vacuum box 65, the mesh belt 75 is in contact with the outer peripheral surface of the rotary drum 50, and the transfer roll 70 and the rotary drum 50 are closest to each other. In the vicinity of the portion, the transfer drum 70 moves away from the outer peripheral surface of the rotating drum 50.
  • the vacuum conveyor 80 includes an endless breathable belt 83 that is stretched between a drive roll 81 and a driven roll 82, and a vacuum box 84 that is disposed at a position facing the transfer roll 70 with the breathable belt 83 interposed therebetween. ing.
  • the absorbent material (mixture of the fiber material and the water-absorbing polymer) 45 is sucked into the concave portion 51 of the rotary drum 50.
  • the absorbent material 45 is gradually deposited on the bottom surface portion 52 of each partition region 54 of the recess 51, and finally, the protruding height from the bottom surface portion 52 of the partition member 53 is set as shown in FIG. It accumulates in the recessed part 51 beyond.
  • the part (partition member corresponding part) 46a formed by depositing the absorbent material 45 on the partition member 53 has a relatively small amount of deposited absorbent material 45, and other parts.
  • Partition region corresponding part) 46b has a relatively large amount of deposited absorbent material 45, and the entire deposit 46 has an uneven structure.
  • the deposit 46 in the concave portion 51 is sucked to the mesh belt 75 by suction from the vacuum box 65.
  • the deposit 46 in the recess 51 is conveyed to a position immediately before the closest portion between the transfer roll 70 and the rotary drum 50, and the mesh belt 75 is sucked from the transfer roll 70 side near the closest portion.
  • the mold is released from the concave portion 51 while being sucked on the transfer roll 70 and moves onto the transfer roll 70.
  • the deposit 46 transferred onto the transfer roll 70 together with the mesh belt 75 is transported to the transfer section (the lowermost end portion of the transfer roll 70) with the vacuum conveyor 80 while being adsorbed by the mesh belt 75 on the transfer roll 70. Then, in the transfer section, the vacuum box 84 moves to the vacuum conveyor 80 by suction.
  • the first core wrap sheet 47 made of tissue paper or water-permeable nonwoven fabric is placed on the vacuum conveyor 80 before the deposit 46 is placed. Is introduced, and the deposit 46 moves onto the first core wrap sheet 47. Further, after the second core wrap sheet 48 is introduced on the upper surface side of the deposit 46, the deposit 46 covered with both the core wrap sheets 47, 48 is cut at a predetermined interval to obtain one napkin. The absorber precursor 49 cut to the minute dimension is obtained.
  • illustration of both the core wrap sheets 47 and 48 is abbreviate
  • the absorber precursor 49 obtained in this way is compressed by the pressurizing means 90, and the thickness of the deposit 46 which comprises the absorber precursor 49 is actively reduced.
  • the intended absorber 4A (absorbent core 40A) is obtained.
  • the pressurizing means 90 includes a pair of rolls 91 and 92 with smooth surfaces, and can pressurize an object to be pressed introduced between the rolls 91 and 92 from the upper and lower surfaces to compress in the thickness direction. It is configured.
  • FIG. 10 schematically shows the state of the deposit 46 before and after compression.
  • the left diagram across the arrow of FIG. 10 shows the deposit 46 before compression
  • the right diagram shows the deposit 46 after compression (absorbent core 40A)
  • the upper stage shows the deposit 46 ( The cross-sectional view of the absorbent core 40A)
  • the lower part shows a perspective view of the deposit 46.
  • the partition region corresponding portion 46b in the deposit 46 becomes a high basis weight portion 41 having a relatively high density in the absorbent core 40A, and the partition member corresponding portion 46a in the deposit 46 is relatively in the absorbent core 40A. It becomes a low basis weight portion 42 having a low density.
  • the relatively high density high basis weight portion 41 and the relatively low density low basis weight portion 42 are alternately formed in both the longitudinal direction X and the width direction Y.
  • the absorbent core 40 ⁇ / b> A having the uneven structure can be efficiently manufactured.
  • the ratio (D41 / D42) of the density D41 of the high basis weight portion 41 and the density D42 of the low basis weight portion 42 is preferably 1.5 to 20, and more preferably 2.0 to 10.
  • the density of the high basic weight part 41 and the low basic weight part 42 is measured as follows.
  • the density of the high basis weight portion 41 was calculated by dividing the weight of the high basis weight portion 41 by the volume (thickness ⁇ length ⁇ width) of the high basis weight portion 41.
  • the density of the low basis weight portion 42 was calculated by dividing the weight of the low basis weight portion 42 by the volume (thickness ⁇ length ⁇ width) of the low basis weight portion 42.
  • the “thickness” used for calculating the volume of each of the high basis weight portion 41 and the low basis weight portion 42 was measured as follows.
  • An acrylic plate having a length of 37 mm, a width of 37 mm, and a thickness of 3 mm is placed on the absorbent core 40A to be measured, and the thickness of the high basis weight portion 41 of the absorbent core 40A is determined by a non-contact type laser displacement meter manufactured by KEYENCE (The thickness of the low basis weight portion 42 was measured using a laser head LK-G30 and a displacement meter LK-GD500), and the cross section of the absorbent core 40A (see FIG. 2) using a microscope VHX-1000 manufactured by KEYENCE. It was measured by observing the cross section as shown. The “weight” of each of the high basis weight portion 41 and the low basis weight portion 42 was measured as follows.
  • the low basic weight part 42 (42X, 42Y) of planar view linear form is formed in the absorptive core 40A whole as shown in FIG. 3 (so that the front part 12, the excretory part opposing part 11, and the rear part 13 may be straddled).
  • the planar view shape of the low basic weight part 42 is not restrict
  • the high basis weight portions 41 may be arranged in a staggered manner. That is, a large number of high basis weight portions 41 are arranged at predetermined intervals in the longitudinal direction X to form a high basis weight portion row, and a plurality of high basis weight portion rows are arranged at predetermined intervals in the width direction Y. In this case, the pitches of the high basis weight portions 41 in the high basis weight portion rows adjacent to each other may be shifted. In other words, the high basis weight portion 41 is adjacent to the high basis weight portion 41 when projected in a direction (width direction Y) perpendicular to the high basis weight portion row in the predetermined high basis weight portion row.
  • the groove 7 is sandwiched between the two high basis weight portions 41, 41 and the two high basis weight portions 41, 41 arranged in the longitudinal direction X or the width direction Y of the napkin 1A.
  • a method of forming continuously with the individual low basis weight portions 42 in other words, as a method of not completely matching the groove 7 and the low basis weight portion 42 of the absorbent core 40A, as in the above embodiment,
  • the angle formed by the direction in which the grooves 7 are formed (the direction in which the linear grooves 7 extend) and the direction in which the low basis weights are formed (the direction in which the linear low basis weights extend) is set to 30 to 60 °. Method, etc.
  • a sanitary napkin is given as one example of application of the absorbent article of the present invention (first invention), but the present invention can also be applied to disposable diapers, incontinence pads, panty liners, and the like.
  • the absorbent article of the present invention (second invention) will be described with reference to the drawings based on a sanitary napkin which is a preferred embodiment thereof.
  • the napkin 1 ⁇ / b> B of the present embodiment includes a top sheet 2 disposed on the skin contact surface side, a back sheet 3 disposed on the non-skin contact surface side, and both sheets 2. It has the absorber 4B interposed between 3 and is vertically long (a shape long in one direction). As shown in FIG.
  • the pair of wing parts 6 and 6 are parts that are wound around the crotch part (crotch part) of the underwear when the napkin 1B is fixed to the underwear such as shorts.
  • the absorbent article (sanitary napkin) of the present invention (second invention) does not have a wing part
  • the excretory part facing part of the sanitary napkin has a so-called short length of 25 cm or less in the product longitudinal direction.
  • the time / daytime napkin is the central part (second area from the front) when the napkin is divided into three equal parts in the longitudinal direction to form the front part, the central part, and the rear part. In the so-called long daytime and nighttime napkins that exceed this, it is the second region from the front (the third region from the back) when these napkins are equally divided into four in the longitudinal direction.
  • the skin contact surface is a surface of the absorbent article or a component thereof that faces the wearer's skin when the absorbent article is mounted, and the non-skin contact surface is the absorbent article.
  • the surface of the member is directed to the side opposite to the skin side (clothing side) when the absorbent article is mounted.
  • a longitudinal direction is a direction along the long side of an absorbent article or its structural member, and a width direction is a direction orthogonal to this longitudinal direction.
  • the direction indicated by the symbol X is the longitudinal direction of the absorbent article (absorber, absorbent core)
  • the direction indicated by the symbol Y is the width direction of the absorbent article (absorber, absorbent core).
  • the top sheet 2 covers the entire skin contact surface 4a of the absorbent body 4B, and further extends outward in the width direction Y from the left and right side edges along the longitudinal direction X of the absorbent body 4B.
  • the back sheet 3 covers the entire area of the non-skin contact surface 4b of the absorbent body 4B, and further extends outward in the width direction Y from both side edges of the absorbent body 4B.
  • the top sheet 2 and the back sheet 3 also extend outward in the longitudinal direction X from the front end and the rear end in the longitudinal direction X of the absorbent body 4B. They are joined together by a known joining means such as an ultrasonic seal.
  • a pair of side sheets 5, 5 are disposed over the entire length in the longitudinal direction X of the napkin 1 ⁇ / b> B on both left and right side portions along the longitudinal direction X of the napkin 1 ⁇ / b> B.
  • the side sheet 5 has an inner side portion in the width direction Y joined to the skin contact surface 2a of the surface sheet 2 by a known joining means, and an outer side portion of the absorbent body 4B. It extends outward in the width direction Y from the side edge along the longitudinal direction X, and the extension part is joined to the extension part from the side edge of the absorber 4B in the back sheet 3 by a known joining means. Yes.
  • the back sheet 3 and the side sheet 5 have the maximum length extending outward in the width direction Y from the side edge of the absorber 4B in the excretory part facing part 11, and the maximum extension part A pair of wing portions 6 and 6 are formed.
  • the non-skin contact surface of the napkin 1B (the non-skin contact surface 3b of the back sheet 3) is directed to the clothing side such as the crotch portion of the shorts when worn.
  • the non-skin contact surface 3b is provided with an adhesive portion (not shown) for fixing the napkin 1B to a crotch portion of underwear such as shorts.
  • the non-skin contact surfaces (non-skin contact surface 3b of the back sheet 3) of the pair of wing portions 6 and 6 are adhesive portions (not shown) for fixing to the outer surface (non-skin contact surface) of the shorts. Z).
  • These adhesive portions are provided by applying a hot melt adhesive to a predetermined location, and are covered with a release sheet (not shown) made of a film, nonwoven fabric, paper, or the like before the napkin 1B is used.
  • the absorbent body 4B includes an absorbent core 40B including an absorbent material (fiber material such as pulp, water-absorbing polymer, etc.).
  • the absorbent body 4B in the present embodiment is configured by covering the absorbent core 40B with a core wrap sheet (not shown) made of tissue paper or a water-permeable nonwoven fabric.
  • the absorbent core 40B may be composed of only a fiber material such as pulp together with the high basis weight portion 41 and the low basis weight portion 42, which will be described later, or includes the fiber material and a water-absorbing polymer.
  • the water-absorbing polymer may be uniformly mixed between the fiber materials, or may include a fiber layer mainly composed of the fiber material and a polymer layer mainly composed of the water-absorbing polymer, and The polymer layer may be sandwiched between the two fiber layers.
  • the top sheet 2 and the absorber 4B, and the absorber 4B and the back sheet 3 are joined to each other by a pattern-coated adhesive (hot melt adhesive or the like) such as dots, spirals, and stripes. Also good.
  • a pattern-coated adhesive hot melt adhesive or the like
  • the absorber 4B has a high basis weight portion 41 having a relatively high basis weight, and a low basis weight portion 42 having a relatively low basis weight adjacent to the high basis weight portion 41.
  • the absorbent core 40 ⁇ / b> B constituting the absorbent body 4 ⁇ / b> B has a relatively small amount of the high basis weight portion 41 and the absorbent material having a relatively large amount of the absorbent material.
  • the low basis weight part 42 (42X, 42Y) has a concavo-convex structure formed alternately in a predetermined direction (longitudinal direction X and width direction Y). As shown in FIG. 13, the apparent thickness of the absorbent core 40B is uniform. More specifically, as shown in FIG.
  • the absorbent core 40 ⁇ / b> B has a linear (continuous linear) low basis weight portion 42 ⁇ / b> X extending along the longitudinal direction X and a linear shape extending along the width direction Y.
  • a plurality of (continuous linear) low basis weight portions 42Y are respectively formed, and the low basis weight portion 42 is formed in a lattice shape as a whole, and parts (parts) defined by these linear low basis weight portions 42X and 42Y ( The position of the grid eye) is the high basis weight portion 41.
  • Each of the plurality of linear low basis weight portions 42X is formed to extend over the entire length in the longitudinal direction X of the absorbent core 40B, and each of the plurality of linear low basis weight portions 42Y is absorbent.
  • the core 40B is formed to extend over the entire length in the width direction Y.
  • Each of the plurality of high basis weight portions 41 has a rectangular shape in plan view as shown in FIG.
  • the skin contact surface 4b (opposite surface to the back sheet 3) has a high basis weight portion 41 (convex portion) formed to protrude and a low basis weight portion 42 (non-convex portion) located between the high basis weight portions 41, 41. Or it has an unevenness due to the recess).
  • the pair of longitudinal grooves 7X and 7X extend over the entire length in the longitudinal direction X of the excretory part-facing part 11 at the left and right side parts along the longitudinal direction X of the absorbent core 40B, and further, the front part 12 and the rear part 13 also extends to each.
  • the lateral groove 7Y1 is formed in the front part 12, and the lateral groove 7Y2 is formed in the rear part 13, respectively.
  • the groove 7 is formed by squeezing the absorbent core 40B together with the top sheet 2 by embossing, and the shallow groove 73 is squeezed relatively weakly in the embossing, and the bottom depth (skin of the bottom wall 71)
  • the depth from the contact surface 2a is a shallow portion
  • the deep groove portion 74 is a portion where the bottom portion depth is deeply squeezed relatively strongly in the embossing.
  • the plan view shapes of the shallow groove portion 73 and the deep groove portion 74 are not particularly limited, and may be a rectangle, a square, a rhombus, a circle, a cross, or the like.
  • a linear (continuous linear) shape in which the napkin 1B extends in the longitudinal direction X is used as a device for more reliably obtaining such an arrangement over the unevenness of the vertical groove 7X. It includes a low basis weight portion 42X, and the longitudinal groove 7X extending in the longitudinal direction X has a portion whose length direction is different from that of the linear low basis weight portion 42X. " . That is, in the present embodiment, as described above, the low basis weight portion 42X is formed in a linear shape extending in the longitudinal direction X in plan view, and the vertical groove 7X is shown in FIG. As shown in FIG.
  • the curved portion of the longitudinal groove 7X is completely the same as the linear low basis weight portion 42X extending in the longitudinal direction X in plan view.
  • the vertical grooves 7 ⁇ / b> X are easily formed so as to straddle the high basis weight portion 41 and the low basis weight portion 42 in the longitudinal direction X without matching.
  • the bottom wall portion 71 of the deep groove portion 74 is relatively far from the surface sheet 2, so that the actual bottom wall portion 71 has a shallow groove portion 73 at a relatively high position and a deep groove portion at a relatively low position. There is a step corresponding to 74
  • the high basis weight portion 41 has a higher density than the low basis weight portion 42, and there is a density gradient in the high basis weight portion 41, the low basis weight portion 42, the groove 7, and the vicinity thereof.
  • the density of the parts indicated by reference signs A to E in FIG. 14B and FIGS. 15 to 17 is A ⁇ B ⁇ C ⁇ E, more preferably A ⁇ B ⁇ C ⁇ D ⁇ E.
  • the density decreases as the distance from the groove 7 (vertical groove 7X) decreases (site A), and the density increases as the distance from the groove 7 increases (area B and / or C). In the groove 7 (bottom wall portion 71), The density is maximized (sites D and E).
  • part D in the low basic weight part 42 (42Y) is along the groove
  • the density gradient that the density increases as it approaches the groove 7 is mainly caused by the formation of the groove 7 by the embossing process described above (squeezing of the absorbent core 40B). Also exists.
  • a characteristic of the present embodiment regarding the density gradient is that B ⁇ C, that is, the high basis weight portion 41 is higher in density than the low basis weight portion 42 in the entire absorbent core 40B. This means that this relationship is also established in the vicinity.
  • the term “in the vicinity of the groove” means the side wall portion 72 (see FIGS. 15 to 17) that defines the groove 7 and the vicinity thereof. It means a portion within 5 mm outside the direction perpendicular to the vertical direction (width direction of the groove 7).
  • the deep groove part 74 plays an important role in the structural stability of the groove 7 and preventing excretion fluid from moving beyond the groove 7 in the width direction Y of the napkin 1B (lateral leakage). If the ratio of the deep groove portion 74 in the groove 7 decreases (that is, the ratio of the shallow groove portion 73 increases), the side leakage prevention property by the groove 7 may be reduced.
  • the ratio (L8 / L9) of the length L8 (see FIG. 18A) of the shallow groove 73 to the length L9 of the deep groove 74 (see FIG. 18A) in the length direction. Is preferably 1.2 to 18, more preferably 1.2 to 4.0.
  • the length L8 of the shallow groove portion 73 in the length direction of the groove is preferably 1.2 to 18.0 mm, and more preferably 1.2 to 4.0 mm.
  • the surface sheet 2 and the back surface sheet 3 various things conventionally used in the said technical field can be especially used without a restriction
  • a liquid-permeable sheet such as a nonwoven fabric or an apertured film can be used.
  • the absorbent article of the present invention (third invention) will be described with reference to the drawings based on a sanitary napkin which is a preferred embodiment thereof.
  • the napkin 1 ⁇ / b> C of the present embodiment includes a top sheet 2 disposed on the skin contact surface side, a back sheet 3 disposed on the non-skin contact surface side, and both sheets 2. It has an absorber 4C interposed between the three, and is vertically long (a shape that is long in one direction). As shown in FIG.
  • the skin contact surface is a surface of the absorbent article or a component thereof that faces the wearer's skin when the absorbent article is mounted, and the non-skin contact surface is the absorbent article.
  • the surface of the member is directed to the side opposite to the skin side (clothing side) when the absorbent article is mounted.
  • a longitudinal direction is a direction along the long side of an absorbent article or its structural member, and a width direction is a direction orthogonal to this longitudinal direction.
  • the direction indicated by the symbol X is the longitudinal direction of the absorbent article (absorber, absorbent core)
  • the direction indicated by the symbol Y is the width direction of the absorbent article (absorber, absorbent core).
  • the surface sheet 2 covers the entire skin contact surface 4a of the absorbent body 4C, and further extends outward in the width direction Y from the left and right side edges along the longitudinal direction X of the absorbent body 4C.
  • the back sheet 3 covers the entire area of the non-skin contact surface 4b of the absorbent body 4C, and further extends outward in the width direction Y from both side edges of the absorbent body 4C.
  • the top sheet 2 and the back sheet 3 also extend outward in the longitudinal direction X from the front end and the rear end of the absorbent body 4C in the longitudinal direction X, respectively. They are joined together by a known joining means such as an ultrasonic seal.
  • the water-absorbing polymer may be uniformly mixed between the fiber materials, or may include a fiber layer mainly composed of the fiber material and a polymer layer mainly composed of the water-absorbing polymer, and The polymer layer may be sandwiched between the two fiber layers.
  • the top sheet 2 and the absorber 4C, and the absorber 4C and the back sheet 3 are joined to each other by a pattern-coated adhesive (hot melt adhesive or the like) such as dots, spirals, and stripes. Also good.
  • a pattern-coated adhesive hot melt adhesive or the like
  • the absorbent core 40 ⁇ / b> C includes a high basis weight portion 41 having a relatively large amount of absorbent material and a low basis weight portion 42 (42 ⁇ / b> X, 42 ⁇ / b> Y) having a relatively small amount of absorbent material.
  • the high basis weight portions 41 and the low basis weight portions 42 are alternately formed in a predetermined direction (each in the longitudinal direction X and the width direction Y). More specifically, the absorbent core 40C includes a linear low basis weight portion 42X extending along the longitudinal direction X and a linear low basis weight portion extending along the width direction Y, as shown in FIG.
  • Each of the plurality of linear low basis weight portions 42X is formed to extend over the entire length in the longitudinal direction X of the absorbent core 40C, and each of the plurality of linear low basis weight portions 42Y is absorbent.
  • the core 40C is formed to extend over the entire length in the width direction Y.
  • Each of the plurality of high basis weight portions 41 has a rectangular shape in plan view as shown in FIG.
  • the absorbent core 40C has a uniform apparent thickness, so that the high basis weight portion 41 is compared to the low basis weight portion 42 (42X, 42Y). Therefore, the absorbent core 40C has a concavo-convex structure in which the high basis weight portion 41 is raised as compared with the low basis weight portion 42.
  • the absorbent core 40C absorbs when the napkin 1C is attached, as compared to the case where the skin contact surface and the non-skin contact surface are both substantially flat. The deformation of the conductive core 40C (absorber 4C) is easily induced.
  • the low basis weight parts 42 (42X, 42Y) are unevenly distributed in the thickness direction of the absorbent core 40C. More specifically, as shown in FIG. 20, the low basis weight portion 42 is unevenly distributed on the skin contact surface 4a side in the thickness direction T of the absorbent core 40C. And since the low basic weight part 42 is unevenly distributed in the skin contact surface 4a side in the thickness direction T in this way, the high basic weight part 41 is the opposite side to the skin contact surface 4a, ie, thickness direction. In T, it protrudes to the non-skin contact surface 4b side.
  • the skin contact surface 4a (opposite surface to the topsheet 2) is substantially flat with no irregularities except for a portion where a groove 7 to be described later is formed.
  • the skin contact surface 4b (opposite surface to the back sheet 3) has a high basis weight portion 41 (convex portion) formed so as to protrude and a low basis weight portion 42 (non-convex portion) located between the high basis weight portions 41, 41. Or it has an unevenness due to the recess).
  • the absorbent core 40C according to the present embodiment has a plurality of absorbent parts having a rectangular shape in plan view made of an absorbent material on one surface side of the absorbent material formed into a thin plate shape. It may appear to be similar to the absorbent body described in Patent Documents 2 and 3 (absorbent body in which a plurality of absorbent parts are fixed to a sheet) in that it is configured to be spaced apart. However, as will be described later, the absorbent core 40C according to the present embodiment is manufactured by molding an absorbent material so as to have the uneven structure, and includes a high basis weight portion 41 and a low basis weight portion.
  • the absorbers described in Patent Documents 2 and 3 are manufactured by fixing a plurality of the absorbing parts to the sheet separate from the absorbing parts, and the absorbing parts And the sheet are joined to each other through a joining means and have a boundary between the absorbing portion and the sheet, and the two are different in this respect.
  • the groove 7 is a space (a portion where the material for forming the napkin 1C does not exist) defined by a bottom wall portion 71 and a side wall portion 72 described later.
  • the groove 7 includes a pair of vertical grooves 7X and 7X that continuously extend in the longitudinal direction X and two horizontal grooves 7Y1 and 7Y2 that extend continuously in the width direction Y. These four grooves are connected at their respective end portions to form an annular groove as a whole.
  • the pair of longitudinal grooves 7X, 7X are formed on both left and right side portions along the longitudinal direction X of the absorbent core 40C with a gap in the width direction Y, and each longitudinal groove 7X is the longitudinal length of the excretory part facing part 11 It extends over the entire length in the direction X, and further extends to the front part 12 and the rear part 13 respectively.
  • the lateral groove 7Y1 is formed in the front part 12, and the lateral groove 7Y2 is formed in the rear part 13, respectively.
  • Both lateral grooves 7Y1 and 7Y2 are formed to include a horizontally long shape that is convexly convex outward in the longitudinal direction X in plan view, and the tops of the protrusions of both lateral grooves 7Y1 and 7Y2 have a width of Located in the center of the direction Y.
  • the groove 7 (7X, 7Y1, 7Y2) has a shallow groove portion 73 that is recessed relatively shallow and a deep groove portion 74 that is recessed relatively deeply.
  • the groove 7 forms a continuous line as a whole by the shallow groove portion 73 and the deep groove portion 74 being alternately connected along the length direction of the groove 7.
  • the groove 7 is formed by squeezing the absorbent core 40C together with the top sheet 2 by embossing, and the shallow groove 73 is squeezed relatively weakly in the embossing, and the bottom depth (skin of the bottom wall 71)
  • the depth from the contact surface 2a is a shallow portion
  • the deep groove portion 74 is a portion that is relatively strongly squeezed in the embossing and has a deep bottom portion.
  • the plan view shapes of the shallow groove portion 73 and the deep groove portion 74 are not particularly limited, and may be a rectangle, a square, a rhombus, a circle, a cross, or the like.
  • the groove 7 (7X, 7Y1, 7Y2) can be formed in accordance with an ordinary method by embossing such as embossing with or without heat, or ultrasonic embossing. That is, in the manufacturing process of the napkin 1C, after supplying the topsheet 2 on one surface of the absorber 4C (absorbent core 40C having an uneven structure), a predetermined portion is moved from the topsheet 2 side to the absorber 4C side by embossing.
  • the groove 7 can be formed in the predetermined portion by pressing (squeezing) in a concave shape.
  • the top sheet 2 and the absorbent body 4C are integrated by heat fusion or the like.
  • the groove 7 includes at least two high basis weight portions (convex portions) 41 and 41 arranged in a predetermined direction and one low basis weight portion (non-covered portion) sandwiched between the two high basis weight portions 41 and 41. (Convex portion or concave portion) 42. That is, the groove 7 is formed so as to straddle the unevenness of the absorbent core 40C.
  • a pair of longitudinal grooves 7X which are a part of the grooves 7, in the excretory part facing part 11 that is a part that directly receives excretion fluid.
  • Each of 7X is formed continuously with two high basis weight portions 41, 41 adjacent to each other in the longitudinal direction X and one low basis weight portion 42Y positioned therebetween, and absorbs continuously with the longitudinal direction X. It is formed so as to straddle the irregularities of the core 40C.
  • the width direction Y in the front portion 12, the lateral groove 7Y1, which is a part of the groove 7, is adjacent to the two high basis weight portions 41, 41 in the width direction Y and one piece between them. It is formed continuously with the low basis weight portion 42 ⁇ / b> X, and further, in the rear portion 13, the lateral groove 7 ⁇ / b> Y ⁇ b> 2 that is a part of the groove 7 is formed in a similar manner.
  • Such a positional relationship between the groove 7 and the high basis weight portion 41 and the low basis weight portion 42 is important in order to more surely exhibit the absorption / diffusion action of excretory fluid according to the present invention described later,
  • the fact that the groove 7 (vertical groove 7X) is formed so as to straddle the irregularities of the absorbent core 40C continuous in the longitudinal direction X is due to the movement of the excretory fluid in the width direction Y to the outside. This is important because it is related to the effect of preventing the leakage (so-called side leakage).
  • the low basis weight portion 42 is as described above.
  • the groove 7 is formed so as to include a linear portion 42X extending in the longitudinal direction X in plan view, and the groove 7 includes a portion 7X having a curved portion and extending in the longitudinal direction X in plan view. Forming. That is, in the present embodiment, the pair of longitudinal grooves 7X and 7X, which are a part of the groove 7, are respectively in the longitudinal direction of the napkin 1C in the excretory part facing part 11 as shown in FIG.
  • Each of both side portions along X includes a vertically long shape that is convexly curved outward in the width direction Y of the napkin 1C.
  • the low basis weight portion 42X of the absorbent core 40C is formed in a straight line that completely coincides with the longitudinal direction X, while the longitudinal groove 7X does not completely coincide with the longitudinal direction X (partial).
  • the curved portion of at least the longitudinal groove 7X can completely coincide with the linear low basis weight portion 42X extending in the longitudinal direction X in plan view.
  • the longitudinal grooves 7X are easily formed so as to straddle the irregularities of the absorbent core 40C continuous in the longitudinal direction X.
  • the low basis weight portion 42 is formed so as to include the linear portion 42Y extending in the width direction Y in plan view as described above
  • the groove 7 is formed so as to include portions 7Y1 and 7Y2 having a curved portion in a plan view and extending in the width direction Y. That is, in the present embodiment, the lateral grooves 7Y1 and 7Y2 that are part of the groove 7 are respectively formed in the napkin 1C at the front part 12 or the rear part 13 of the napkin 1C as shown in FIG.
  • the horizontal grooves 7Y1 and 7Y2 so that at least the respective curved portions of the lateral grooves 7Y1 and 7Y2 are linear low-tsubo extending in the width direction Y in plan view.
  • the lateral grooves 7Y1 and 7Y2 do not completely coincide with the amount portion 42Y, and the lateral grooves 7Y1 and 7Y2 are easily formed so as to straddle the unevenness of the absorbent core 40C continuous in the width direction Y.
  • the groove 7 (7X, 7Y1, 7Y2) is defined by a bottom wall portion 71 and a side wall portion 72 standing from the bottom wall portion 71, as shown in FIGS. 22 to 24, for the sake of easy explanation, the illustration of the shallow groove portion 73 and the deep groove portion 74 is omitted, and the bottom wall portion 71 is described as a substantially flat portion having no step in the length direction of the groove 7. In practice, however, the position of the bottom wall portion in the thickness direction of the absorbent core differs between the shallow groove portion 73 and the deep groove portion 74, and the bottom wall portion 71 of the shallow groove portion 73 is relatively distant from the topsheet 2.
  • the bottom wall portion 71 of the deep groove portion 74 is relatively far from the surface sheet 2, so that the actual bottom wall portion 71 has a shallow groove portion 73 at a relatively high position and a deep groove portion at a relatively low position. There is a step corresponding to 74
  • the low basic weight part 42 is made into the thickness direction in the site
  • the point which the tear 78 which penetrates is formed is mentioned.
  • FIG. 25 schematically shows a substantially elliptical tear 78 and its vicinity in an enlarged view in plan view.
  • the present invention is particularly effective when applied to absorbent articles mainly intended for absorption of menstrual blood, such as sanitary napkins and panty liners.
  • the tear 78 has a function of hindering the movement of the excretory fluid, and such a function of the tear 78 contributes to the diffusion of the excretory fluid in the front-rear direction of the napkin 1C.
  • the tear 78 is formed in a portion constituting the side wall portion 72 in the low basis weight portion 42 due to the formation of the groove 7 by embossing, but the side wall portion 72 in the high basis weight portion 41 is formed. It is not formed on the constituent parts.
  • the high basis weight portion 41 has a thickness larger than that of the low basis weight portion 42 and is raised as a convex portion, so that when the groove 7 is embossed when the groove 7 is formed, it is pushed in a concave shape in the thickness direction.
  • the formation site of the tear 78 even in the side wall portion 72 in the same low basis weight portion 42, there are a site where the tear 78 is easily formed and a site where it is difficult to form. That is, the region sandwiched between the pair of grooves 7 and 7 (the pair of vertical grooves 7X and 7X), in other words, the side wall portion 72 located on the inner side of the napkin with respect to the vertical groove 7X (bottom wall portion 71), The side wall 72 located on the opposite side (napkin outer side) via the longitudinal groove 7X is a portion where the tear 78 is difficult to be formed.
  • the tear 78 is formed in the side wall 72 located on the inner side of the napkin with respect to the groove 7 (bottom wall 71), and is formed in the side wall 72 located on the outer side of the napkin.
  • the region sandwiched between the pair of vertical grooves 7X, 7X is embossed from the upper side (surface sheet 2 side) at both ends in the width direction Y of the region.
  • the stress escape field of the absorber strain is in the width direction.
  • the tear 78 is at least inward in the width direction Y from the groove 7 (vertical groove 7X) in the excretory part facing part 11. It is preferable to be formed in the side wall part 72 located in the side. In the present embodiment, the tear 78 is formed not only in the excretory part facing part 11 but also in the front part 12 and the rear part 13, and only in the side wall part (side wall part on the inner side of the napkin) 72 of the vertical groove 7X.
  • each of the lateral grooves 7Y1 and 7Y2 is also formed on the side wall portion (side wall portion on the inner side of the napkin) 72 of each of the lateral grooves 7Y1 and 7Y2.
  • the lateral grooves 7Y1 and 7Y2 correspond to “a pair of grooves formed at predetermined intervals” that play an important role in forming the tear 78.
  • the deep groove portion 74 is a portion that is strongly squeezed compared to the shallow groove portion 73 in embossing for forming the groove 7, and the deep groove portion 74 that is such a strong squeezed portion is a plan view. In this case, the breakage of the low basis weight portion 42 due to the embossing described above is promoted, and a tear 78 is formed in the portion constituting the side wall portion 72 in the low basis weight portion 42. Is easily formed.
  • the deep groove portion 74 is located at the center of the width direction of the groove 7 (vertical groove 7X) (direction perpendicular to the length direction of the groove 7), and the deep groove portion It is preferable that the shallow groove portion 73 is located outside the 74 in the width direction.
  • the ratio (L9 / L10) between them is preferably 0.05 to 0.5, more preferably 0.1 to 0.4.
  • the density decreases as the distance from the groove 7 (vertical groove 7X) decreases (site A), and the density increases as the distance from the groove 7 increases (area B and / or C). In the groove 7 (bottom wall portion 71), The density is maximized (sites D and E).
  • part D in the low basic weight part 42 (42Y) is along the groove
  • the density gradient that the density increases as it approaches the groove 7 is mainly caused by the formation of the groove 7 by embossing as described above (squeezing of the absorbent core 40C), and an absorbent body in which a conventional leak-proof groove is formed. Also exists.
  • the density gradient is characterized in that the part C has a higher density (B ⁇ C) than the part B, and the vicinity of the groove 7 is the density of the high basis weight portion 41 and the low basis weight portion 42. Is different.
  • the “near the groove” means the side wall portion 72 (see FIGS. 22 to 24) that defines the groove 7 and its adjacent portion (a portion adjacent to the side wall portion 72 in a plan view of the groove 7).
  • the adjacent portion means a portion within 5 mm outward from the groove 7 (outer surface of the side wall portion 72) in a direction orthogonal to the length direction of the groove 7 (width direction of the groove 7).
  • the boundary between the side wall portion and the adjacent portion is not clear, but in the present invention, a flat acrylic plate (weight 5 g) is provided on the skin contact surface side (surface sheet side) of the absorbent article.
  • a flat acrylic plate weight 5 g
  • the region that approaches the groove from the vicinity of the groove (the adjacent portion) in the width direction of the groove A portion where the skin contact surface (surface sheet) is separated from the acrylic plate is defined as the boundary.
  • the portions B and C in the vicinity of the groove 7 have the same distance from the groove 7, but the portion C located in the high basis weight portion 41 has a lower basis weight.
  • the reason why the density is higher than the portion B located in the amount portion 42 (42Y) is that the high basis weight portion 41 is more absorbent than the low basis weight portion 42 before the groove 7 is formed by pressing the absorbent core 40C. This is because there are many materials and the density is high. That is, as will be described later, the absorbent core 40C according to the present embodiment obtains a deposit having an uneven structure by depositing an absorbent material so as to have a high basis weight portion 41 and a low basis weight portion 42.
  • the high basis weight portion 41 as the convex portion is more non-convex or as the concave portion. Since it is compressed more strongly than the low basis weight portion 42, the high basis weight portion 41 (site C) has a higher density than the low basis weight portion 42 (site B). Thus, there is a difference in density between the part B and the part C before the formation of the groove 7, and when the groove 7 is formed in the part B and the part C by pressing, the side wall part 72 that defines the groove 7. And this density difference is reflected in the vicinity thereof, and as a result, B ⁇ C with respect to the density. As shown in FIG.
  • the tear 78 has a symmetrical relationship with the part B across the groove 7 (vertical groove 7X), so the vicinity of the tear 78 in the low basis weight portion 42 (the tear).
  • the area within 3 mm from the peripheral edge of 78) has substantially the same density as the part B. Therefore, the vicinity of the tear 78 is also lower in density than the part C (the vicinity of the tear 78 in the low basis weight portion 42 ⁇ C).
  • the napkin 1C of the present embodiment has a concavo-convex structure formed by a high basis weight part (convex part) 41 and a low basis weight part (non-convex part or concave part) 42 as an absorbent core in which the grooves 7 are formed.
  • the absorbent core 40C it is possible to solve the above-mentioned problem ii) of the conventional absorbent article employing a combination of a flat absorbent core having no irregularities and a leak-proof groove, and the absorber 4C ( Despite the formation of the high-density grooves 7 in the absorbent core 40C), partial curing of the absorbent body 4C hardly occurs and the fit is excellent. As shown in FIG.
  • the groove 7 is mainly connected to two high basis weight portions 41, 41 adjacent to each other in a predetermined direction and one low basis weight portion 42 positioned therebetween.
  • excretion fluid such as menstrual blood
  • the above-mentioned problem i) of an absorbent article employing a combination of a conventional flat absorbent core having no irregularities and a leak-proof groove can be solved, and has excellent leak-proof properties (side-leakage prevention properties), and an absorbent body. Therefore, the size of the absorbent article can be reduced, and the absorbent article can be made compact.
  • the absorption / diffusion action of excretory fluid in the napkin 1C of the present embodiment will be described with reference to FIG. 21 (b).
  • the excretory fluid W such as menstrual blood excreted by the wearer of the napkin 1C is usually opposed to the excretory part. 21 is received at the center of the width direction Y of the portion 11 and moves in the width direction Y from the skin contact surface (skin contact surface 2a of the topsheet 2) toward the groove 7 (vertical groove 7X).
  • various constituent members (surface sheet) of the napkin 1C from the part A (near the center part in the width direction Y of the excretory part facing part 11) toward the tear 78 (near the groove 7 in the low basis weight part 42).
  • the tear 78 is a space in which the material for forming the absorbent core 40C such as the absorbent material (the material for forming the napkin 1C) does not exist, and therefore excretion that has reached the vicinity of the tear 78.
  • the liquid W cannot pass through the tear 78 and therefore cannot cross the tear 78. Therefore, as shown in FIG. In the vicinity of the groove 7 (the part C on the inner side in the width direction Y from the groove 7).
  • the vicinity of the tear 78 in the low basis weight portion 42 is similar to the portion C in the same manner as the portion B located symmetrically with the tear 78 across the groove 7 (vertical groove 7X).
  • the density is low (B ⁇ C)
  • a capillary force is likely to act between the vicinity of the tear 78 and the site C, and the movement of the excretory fluid W to the site C is also promoted by this capillary force. Is done.
  • the excretion liquid W moves in the front-rear direction of the napkin 1C along the groove 7 in the vicinity of the groove 7 and inward in the width direction Y from the groove 7, and quickly from the excretion part facing part 11 in the longitudinal direction X. To spread.
  • the excretory liquid W is quickly absorbed and held by the high basis weight portion 41 while moving from the portion B to the portion C in the vicinity of the groove 7 and inward in the width direction Y from the groove 7.
  • the part exceeding the absorption capacity of the part E is located in the part E (the bottom wall part 71 defining the groove 7 in the high basis weight part 41) located outside the part C in the width direction Y.
  • the part E is the part most compressed when the groove 7 is formed, and the density thereof is overwhelmingly higher than the part C adjacent to the width direction Y, so that the excretion fluid W moves from the part E to the part C. Therefore, it is difficult for the excretion liquid W to move outward in the width direction Y of the napkin 1C over the groove 7.
  • the excretion fluid W that has moved to the site E via the site C passes through the groove 7 without leaking to the outside of the groove 7, and is adjacent to the site D (the bottom wall that defines the groove 7 in the low basis weight portion 42. Part 71) and further to another part E adjacent thereto.
  • the excretory fluid W moving in the groove 7 is absorbed and held mainly by the high basis weight portion 41 during the movement.
  • the excreted liquid excreted in the central portion in the width direction Y of the excretory part facing part 11 is closer to the longitudinal groove 7X and the longitudinal groove 7X than the longitudinal groove 7X.
  • the napkin 1C is quickly diffused in the front-rear direction, and is absorbed and held mainly by the high basis weight portion 41 in the middle of such diffusion.
  • the napkin 1C of the present embodiment can quickly diffuse and absorb the excreted excretory liquid by the diffusion and absorption action of the excreted liquid by the cooperation of the absorbent body 4C (absorbent core 40C) and the groove 7, It is difficult to cause side leakage and can eliminate discomfort caused by the wetness of the wearer. From the viewpoint of more surely exhibiting the operational effects of the napkin 1C, it is preferable to set the dimensions and the like of the respective parts as follows.
  • the ratio (S41 / S42) of the basis weight S41 of the high basis weight portion 41 and the basis weight S42 of the low basis weight portion 42 of the absorbent core 40C is preferably 1.25 or more, more preferably 3 or more, and preferably Is 10 or less, more preferably 6 or less.
  • the basis weight S41 of the high basis weight portion 41 is preferably 100 g / m 2 or more, more preferably 150 g / m 2 or more, and preferably 600 g / m 2 or less, more preferably 500 g / m 2 or less.
  • the basis weight S42 of the basis weight part 42 is preferably 10 g / m 2 or more, more preferably 30 g / m 2 or more, and preferably 150 g / m 2 or less, more preferably 100 g / m 2 or less.
  • the ratio (T41 / T42) between the thickness T41 of the high basis weight portion 41 and the thickness T42 of the low basis weight portion 42 is preferably 1 or more, more preferably 1.5 or more, and preferably 20 or less, more preferably 10 or less.
  • the thickness T41 of the high basis weight portion 41 is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 10 mm or less, more preferably 8 mm or less.
  • the thickness T42 of the low basis weight portion 42 is preferably It is 0.1 mm or more, more preferably 0.2 mm or more, and preferably 5.0 mm or less, more preferably 3.0 mm or less.
  • the width L1 (see FIG. 21A) of the low basis weight portion 42 is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 7.5 mm or less, more preferably 5 mm or less.
  • the low basis weight portions 42X and 42Y may have the same or different width L1.
  • the size of the high basis weight portion 41 in a plan view as shown in FIG. 21A varies depending on the type and use of the absorbent article, but in a sanitary napkin such as the napkin 1C, the length L2 in the longitudinal direction X (Refer to FIG.
  • 21A is preferably 5 mm or more, more preferably 10 mm or more, and preferably 50 mm or less, more preferably 30 mm or less, and the length L3 in the width direction Y (see FIG. 21A). ) Is preferably 3 mm or more, more preferably 5 mm or more, and preferably 30 mm or less, more preferably 20 mm or less.
  • the number of high basis weight portions 41 is preferably 5 or more, more preferably 10 or more, and preferably 70 or less, more preferably 60 or less per 50 cm 2 area.
  • the width L5 (see FIG. 21B) of the groove 7 (7X, 7Y1, 7Y2) is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 5.0 mm or less, more preferably 4 0.0 mm or less.
  • the depth L6 of the groove 7 (see FIG. 23) is preferably 0.5 mm or more, and more preferably 1.0 mm.
  • the depth L6 means the depth of the deep groove portion 74, which is the deepest part in the groove 7.
  • the depth of the shallow groove portion 73 is preferably less than 0.5 mm, more preferably less than 1.1.0 mm.
  • a length L7 (see FIG. 25) along the length direction of the groove 7 (7X, 7Y1, 7Y2) of the tear 78 is along the length direction of the low basis weight portion 42 in which the tear 78 is formed.
  • the length is preferably 20 to 90%, more preferably 40 to 80%, with respect to the length (for example, the length along the length direction of the groove 7X of the low basis weight portion 42Y in FIG. 25).
  • the length L8 (see FIG. 25) along the width direction of the groove 7 (7X, 7Y1, 7Y2) of the tear 78 is preferably equal to or less than the length L7 (L7 ⁇ L8).
  • channel 7 mentioned above may be measured using a ruler etc. with the naked eye, Preferably, it measures using a digital microscope.
  • the groove 7 can be enlarged and photographed using a digital microscope VHX-1000 manufactured by KEYENCE, and the dimensions of each part can be measured.
  • the width L5 of the groove 7 is measured at the bottom surface of the groove 7.
  • the depth L6 of the groove 7 is obtained by measuring the cross section of the groove 7 with a digital microscope.
  • the top sheet 2 and the back sheet 3 various materials conventionally used in the technical field can be used without particular limitation.
  • the surface sheet 2 for example, a liquid-permeable sheet such as a nonwoven fabric or an apertured film can be used.
  • the back sheet 3 for example, a resin film that does not have moisture permeability, a resin film that has micropores and has moisture permeability, a nonwoven fabric such as a water-repellent nonwoven fabric, a laminate of these and other sheets, and the like are used. Can do.
  • seat 5 the various things conventionally used in the said technical field can be especially used without a restriction
  • an absorptive material which is a forming material of the absorptive core 40C
  • various materials conventionally used in the technical field can be used without particular limitation.
  • natural materials such as wood pulp, cotton, hemp and the like can be used as fiber materials.
  • Fibers synthetic fibers made of synthetic resins such as polyethylene and polypropylene; semi-synthetic fibers such as acetate and rayon can be used. Further, in addition to these fiber materials, water-absorbing polymers of various shapes such as particles can be used as the absorbent material.
  • the present invention (third invention) is not limited to the above embodiment.
  • the low basic weight part 42 was unevenly distributed in the skin contact surface 4a side in the thickness direction of the absorptive core 40C, on the contrary, it is on the non-skin contact surface 4b side. It may be unevenly distributed.
  • the high basic weight part 41 protrudes to the skin contact surface 4a side, and the upper and lower sides of the absorbent core 40C as a whole are reversed from those shown in FIG.
  • the groove 7 is formed in the two high basis weight portions 41, 41 and the two high basis weight portions 41, 41 arranged in a predetermined direction (longitudinal direction X or width direction Y of the napkin 1C).
  • a method of continuously forming the sandwiched one low basis weight portion 42 in other words, as a method of not making the groove 7 and the low basis weight portion 42 of the absorbent core 40C completely coincide with each other, the above embodiment is used.
  • the peripheral seal part 5 is formed in the peripheral part.
  • the peripheral seal portion 5 is formed by hot embossing, but may be formed by ultrasonic sealing, or may be formed by an adhesive such as hot melt.
  • the high basic weight part 41 and the low basic weight part 42 are integrally molded, it will have the continuity which a bodily fluid can move smoothly.
  • the low basis weight part 42 is unevenly distributed on the topsheet 2 side (skin facing surface side of the absorbent body 4D) in the thickness direction T of the absorbent article 1D.
  • the high basic weight part 41 is the opposite side to the surface sheet 2 side, That is, it protrudes to the back sheet 3 side in the thickness direction T (the non-skin facing surface side of the absorber 4D).
  • the skin facing surface (surface on the surface sheet 2 side) side of the absorbent core 40D is composed of the low basis weight portion 42 and is formed substantially in a substantially flat shape. Further, in the absorbent core 40D, a plurality of high basis weight portions 41 (convex portions) and high basis weight portions 41 that are formed to protrude on the non-skin facing surface (surface on the back sheet 3 side) side of the absorbent core 40D. , 41 and a low basis weight portion 42 (concave portion) is formed between the concave and convex portions.
  • the recess is mainly formed by the low basis weight portion 42
  • the high basis weight portion 41 near the boundary between the low basis weight portion 42 and the high basis weight portion 41 forms a part of the recess.
  • the convex portion is mainly formed by the high basis weight portion 41” means that the low basis weight in the vicinity of the boundary between the high basis weight portion 41 and the low basis weight portion 42. This means that the amount portion 42 forms a part of the convex portion.
  • the thickness of the low basic weight part 42 (concave part) is 80% or less of the thickness of the high basic weight part 41 (convex part), preferably 70% or less, and the thickness of the low basic weight part 42 (concave part) is preferably Is 0.3 mm or more, more preferably 0.5 mm or more, and preferably 3.0 mm or less, more preferably 2.0 mm or less.
  • the thickness of the high basis weight part 41 (convex part) is preferably 0.5 mm or more, more preferably 1.0 mm or more, and preferably 7.0 mm or less, more preferably 5.0 mm or less.
  • the length is 100 mm
  • the width is a piece manufactured by Feather Co., Ltd. according to the design dimensions of the width of the low basis weight portion 42.
  • Using a blade razor cut out five samples of the thin striped low basis weight portion 42. Each of the five obtained samples is measured using an electronic balance (Electronic Balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point), and the weight of one sample of the low basis weight portion 42 is obtained on average.
  • the calculated weight is divided by the area of the sample of the low basis weight portion 42 to calculate the basis weight of the low basis weight portion 41.
  • the high basis weight portion 41 forming the convex portion has a density of 0.05 to 0.50 g / cm 3 , and preferably 0.10 to 0.40 g / cm 3 .
  • the ratio (D41 / D42) of the density D41 of the high basis weight portion 41 and the density D42 of the low basis weight portion 42 is 1/5 to 3/4. It is preferably 1/4 to 2/3.
  • the density of the low basis weight portion 42 forming the concave portion is 0.01 to 0.20 g / cm 3 , and preferably 0.03 to 0.15 g / cm 3 .
  • a plurality of continuous linear recesses (low basis weight portions 42X) extending in the longitudinal direction X and a plurality of back sheets 3 are formed.
  • the space 6X extends continuously in the longitudinal direction X
  • the plurality of spaces 6Y formed by the continuous linear recesses (low basis weight portion 42Y) extending in the width direction Y and the back sheet 3 have a width. Each extends continuously in the direction Y.
  • the humidity in the dressing is particularly high due to absorption of menstrual blood
  • the humidity in the dressing is considered to be particularly high due to absorption of urine.
  • the space 6X continuously extending in the longitudinal direction X (low 2 or more are preferable, and it is more preferable that 3 or more are provided.
  • the amount of urine absorbed per disposable diaper is generally larger than the amount of menstrual blood absorbed per sanitary napkin.
  • disposable diapers are more disposable than sanitary napkins.
  • the absorbent article 1D is easily deformed into a convex shape toward the wearer's skin to improve fit and prevent leakage, and the non-skin compared to the wearer's skin contact surface of the absorbent body 4D
  • the depth d2 of the quantity parts 42X, 42Y) is deeper than the depth d1 of the surface side recesses 43X, 43Y.
  • the length of the lower side L5 is the length of the upper side L4 from the viewpoint of effectively reducing the humidity generated from the urine absorbed in the absorbent body 4D.
  • the thickness is preferably 1.5 to 7 times, more preferably 2 to 5 times.
  • the length of the lower side L5 is measured in the same manner as the thicknesses of the high basis weight portion 41 (convex portion) and the low basis weight portion 42 (concave portion) described above.
  • the lower side L5 is a contour path
  • the lower side L5 is the length in the width direction (Y direction) at the top of the convex portion (high basis weight portion 41) of the concavo-convex structure on the back sheet 3 side, and the convex portion (high plow).
  • the contour path length is measured in the same manner as the lower side L5.
  • the space 6 formed by the concave portion (low basis weight portion 42) of the uneven structure on the back sheet 3 side and the back sheet 3 is as shown in FIGS. 27 and 28 in the absorbent article 1D. It consists of a plurality of spaces 6X extending continuously in the longitudinal direction X and a plurality of spaces 6Y extending continuously in the width direction Y.
  • the low basis weight portion 42 in the intersecting region 6XY of the space 6X extending in the longitudinal direction X and the space 6Y extending in the width direction Y is the center of the intersecting region 6XY as shown in FIG.
  • the thickness is the thinnest in the part.
  • the surface side concave portion 43X is formed corresponding to the low basis weight portion 42X that forms the concave portion in the longitudinal direction X, and the concave portion in the width direction Y is formed.
  • the surface-side recess 43X has a circular arc shape at the bottom of the surface-side recess 43X.
  • the surface side recess 43Y is also formed in an arc shape at the bottom of the recess as viewed in cross section.
  • the central portion is most concave on the back sheet 3 side. Therefore, the distance between the central portion in the intersecting region between the surface-side concave portion 43X and the surface-side concave portion 43Y and the central portion in the intersecting region 6XY between the space 6X in the longitudinal direction X and the space 6Y in the width direction Y is the largest. It is short and the thickness of the central part in the intersection area 6XY is the thinnest in the low basis weight part 42. With such a configuration, the moisture existing between the absorbent article 1D and the wearer's skin can be absorbed through the intersecting region 6XY, and the effect of making the wearer less likely to feel stuffiness can be achieved.
  • the absorber (absorbent core) according to the fourth invention can be manufactured by the same method as the method for manufacturing the absorber (absorbent core) according to the first invention described above.
  • the absorber 4D (absorbent core 40D) according to the fourth invention can be manufactured in the same manner as the absorber 4A (absorbent core 40A) according to the first invention using the absorber manufacturing apparatus shown in FIG.
  • the description of the manufacturing method of the absorbent body 4A (absorbent core 40A) according to the first invention described above can be applied to the manufacturing method of the absorbent body 4D (absorbent core 40D) according to the third aspect of the invention.
  • the absorbent article 1D has a sufficient ventilation rate to quickly exhaust moisture existing between the wearer's skin and the sanitary napkin surface, and is fine enough to allow air to pass through.
  • the moisture permeability of the moisture permeable sheet used for the back sheet 3 is preferably 0.5 g / 100 cm 2 ⁇ hr or more, from the viewpoint that it is necessary to have sufficient water pressure resistance so that menstrual blood does not ooze out from the pores.
  • it is 1.0 g / 100 cm 2 ⁇ hr or more, preferably 3.0 g / 100 cm 2 ⁇ hr or less, more preferably 2.0 g / 100 cm 2 ⁇ hr or less, and more specifically, preferably 0 g / 100 cm 2 ⁇ hr or less. 0.5 to 3.0 g / 100 cm 2 ⁇ hr, more preferably 1.0 to 2.0 g / 100 cm 2 ⁇ hr.
  • it is necessary to quickly evaporate a large amount of moisture generated from urine from the inside of the disposable diaper.
  • the absorbent body 4D included in the absorbent article 1D includes an integrally formed high basis weight portion 41 (convex portion) and low basis weight portion 42 (low basis weight portions 42X, 42Y) (concave portion).
  • the low basis weight portion 42 (low basis weight portions 42X and 42Y) is unevenly distributed on the top sheet 2 side, and has an uneven structure on the back sheet 3 side of the absorbent body 4D.
  • the high basic weight part 41 and the low basic weight part 42 are integrally molded, the low basic weight unevenly distributed in the surface sheet 2 side at the time of use of absorbent article 1D.
  • the high basis weight portion 41 (convex) is formed at a higher density than the low basis weight portion 42 (42X, 42Y) (concave), and therefore the absorbent article 1D is used.
  • the body fluid is more likely to move from the low basis weight portion 42 (low basis weight portions 42X, 42Y) unevenly distributed on the surface sheet 2 side to the high basis weight portion 41.
  • the high basis weight portion 41 has a relatively high absorption capacity with respect to the low basis weight portion 42 and has a high density, and therefore absorbs liquid faster than the low basis weight 42.
  • the low basic weight part 42 is more difficult to absorb liquid than the high basic weight part 41, the low basic weight part 42 is less likely to swell and is adjacent to the enemy basic weight part even after the absorber 4D absorbs a relatively large amount of liquid.
  • the spaces 6X and 6Y are not lost.
  • the space 6Y formed by the concave portion (low basis weight portion 42 (low basis weight portion 42Y)) and the moisture-permeable back sheet 3 also extends continuously in the width direction Y. Therefore, the moisture in the wearing during use is more easily diffused from both side edges of the product, with the space 6Y having a shorter moving passage as a passage.
  • the absorbent article of this invention (4th invention) is not restrict
  • the high basis weight portion 41 in the absorbent core 40D of the absorbent body 4D, the high basis weight portion 41 is arranged at substantially equal intervals in the longitudinal direction X and the width direction Y as shown in FIGS.
  • the space 6X formed by the concave portion (low basis weight portion 42 (low basis weight portion 42X)) and the moisture-permeable back sheet 3 in the concavo-convex structure extends continuously in the longitudinal direction X,
  • the high basic weight portions 41 may be arranged in a zigzag pattern.
  • a large number of high basis weight portions 41 are arranged at predetermined intervals in the longitudinal direction X to form a high basis weight portion row, and a plurality of high basis weight portion rows are arranged at predetermined intervals in the width direction Y.
  • the pitches of the high basis weight portions 41 in the high basis weight portion rows adjacent to each other may be shifted.
  • the high basis weight portion 41 is adjacent to the high basis weight portion 41 when projected in a direction (width direction Y) orthogonal to the high basis weight portion row in the predetermined high basis weight portion row. You may arrange
  • a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the absorbent body is configured to include an absorbent core including an absorbent material, and the absorbent core includes a high basis weight portion in which the absorbent material is relatively large and a low basis weight in which the absorbent material is relatively small.
  • the high basis weight part and the low basis weight part are alternately formed in each of the longitudinal direction and the width direction of the absorbent article,
  • a groove is formed by recessing the top sheet and the absorbent core integrally, and the groove is at least two pieces of the side by side in the longitudinal direction or the width direction. It is formed continuously with a high basis weight part and one low basis weight part sandwiched between two high basis weight parts,
  • channel is located in the non-skin contact surface side rather than the thickness direction center of the said absorbent core.
  • the groove is convexly curved outward in the width direction of the absorbent article in a plan view at both side portions along the longitudinal direction of the absorbent article in the excretory part facing portion of the absorbent article.
  • the low basis weight portion is formed so as to include a linear portion extending in the width direction of the absorbent article in a plan view, and the groove is a length of the absorbent article in a plan view.
  • the high basis weight portion is thicker than the low basis weight portion, and the absorbent core has an uneven structure in which the high basis weight portion is raised as compared to the low basis weight portion.
  • the absorbent article according to any one of [1] to [5].
  • the low basis weight portion is unevenly distributed on the skin contact surface side in the thickness direction of the absorbent core.
  • the absorbent article as described.
  • the low basis weight portion is unevenly distributed on the non-skin contact surface side in the thickness direction of the absorbent core, any one of [1] to [6] Absorbent article as described in 1.
  • a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the absorbent body is configured to include an absorbent core including an absorbent material, and the absorbent core includes a high basis weight portion in which the absorbent material is relatively large and a low basis weight in which the absorbent material is relatively small.
  • the high basis weight part and the low basis weight part are alternately formed in a predetermined direction
  • a groove is formed by recessing the top sheet and the absorbent core integrally,
  • the groove is defined by a bottom wall portion and a side wall portion standing from the bottom wall portion, and is sandwiched between at least the two high basis weight portions and the two high basis weight portions arranged in a predetermined direction.
  • a vertically long absorbent article having a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the absorbent body is configured to include an absorbent core including an absorbent material, and the absorbent core is adjacent to the high basis weight portion, the high basis weight portion being relatively rich in the absorbent material, and the high basis weight portion.
  • the absorbent material has a relatively low low basis weight part, and the low basis weight part is unevenly distributed on the skin contact surface side in the thickness direction of the absorbent core
  • the absorbent article has a groove in which the topsheet and the absorbent core are integrally recessed and extends in a longitudinal direction of the absorbent article, and the groove includes the high basis weight portion and the high basis weight portion.
  • a shallow groove portion that is formed so as to straddle a low basis weight portion and is relatively shallowly recessed in the groove, and a deep groove portion that is relatively deeply recessed in the length direction of the groove. are alternately formed along
  • the shallow groove part is an absorbent article having a longer length in the length direction of the groove than the deep groove part.
  • the groove is convexly curved outward in the width direction of the absorbent article in a plan view on both side portions along the longitudinal direction of the absorbent article in the excretory part facing portion of the absorbent article.
  • the absorbent article according to any one of [11] to [15], which is formed so as to include a vertically long shape.
  • the low basis weight portion is formed so as to include a linear portion extending in the width direction of the absorbent article in a plan view, and the groove is a longitudinal direction of the absorbent article in a plan view.
  • the absorbent article according to any one of [11] to [17], wherein the absorbent article is formed to include a horizontally long shape that is convexly curved outward in the direction.
  • a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the back sheet has moisture permeability
  • the absorbent body has a high basis weight part having a relatively high basis weight and a low basis weight part having a relatively low basis weight adjacent to the high basis weight part,
  • the low basis weight part is integrally molded, and the concave-convex structure in which the convex part that is the high basic weight part and the concave part that is the low basic weight part are alternately arranged on the back sheet side of the absorber.
  • the low basis weight portion is unevenly distributed, the concave portion is recessed on the surface sheet side, and the convex portion is convex on the back sheet side,
  • An absorbent article in which a space formed by the concave portion and the back sheet extends continuously in at least the longitudinal direction.
  • the high basis weight portion is thicker than the low basis weight portion, and the absorbent core has an uneven structure in which the high basis weight portion is raised as compared to the low basis weight portion.
  • the absorbent article according to any one of [19].
  • a vertically long absorbent article having a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the absorbent body has a high basis weight part having a relatively high basis weight and a low basis weight part having a relatively low basis weight adjacent to the high basis weight part, and the low basis weight part.
  • the absorbent article has a groove in which the topsheet and the absorbent body are integrally recessed and extends in the longitudinal direction of the absorbent article, and the groove includes the high basis weight portion and the low basis weight portion.
  • the shallow groove part is an absorbent article having a longer length in the length direction of the groove than the deep groove part.
  • the absorbent body includes the linear low basis weight portion extending in the longitudinal direction of the absorbent article, and the groove is a portion having a different length direction from the linear low basis weight portion.
  • a vertically long absorbent article comprising a top sheet disposed on the skin contact surface side, a back sheet disposed on the non-skin contact surface side, and an absorbent body interposed between both sheets,
  • the absorbent body is configured to include an absorbent core including an absorbent material, and the absorbent core includes a high basis weight portion in which the absorbent material is relatively large and a low basis weight in which the absorbent material is relatively small.
  • the high basis weight part and the low basis weight part are alternately formed in a predetermined direction
  • a groove is formed by recessing the top sheet and the absorbent core integrally,
  • the groove is defined by a bottom wall portion and a side wall portion standing from the bottom wall portion, and is sandwiched between at least the two high basis weight portions and the two high basis weight portions arranged in a predetermined direction.
  • the low basis weight portion is formed so as to include a linear portion extending in the width direction of the absorbent article in a plan view, and the groove is a length of the absorbent article in a plan view.
  • the groove includes a shallow groove portion that is relatively shallowly recessed and a deep groove portion that is relatively deeply recessed, and at least a part of the deep groove portion is the low-tsubo in plan view.
  • a longitudinal absorbent article comprising a top sheet disposed on the skin facing surface side, a back sheet disposed on the non-skin facing surface side, and a longitudinal absorbent body interposed between both sheets,
  • the back sheet has moisture permeability
  • the absorbent body has a high basis weight part having a relatively high basis weight and a low basis weight part having a relatively low basis weight adjacent to the high basis weight part,
  • the low basis weight part is integrally molded, and the concave-convex structure in which the convex part that is the high basic weight part and the concave part that is the low basic weight part are alternately arranged on the back sheet side of the absorber.
  • the low basis weight portion is unevenly distributed, the concave portion is recessed on the surface sheet side, and the convex portion is convex on the back sheet side,
  • An absorbent article in which a space formed by the concave portion and the back sheet extends continuously in at least the longitudinal direction.
  • the absorber has, on the top sheet side of the absorber, a front-side recess that is recessed on the back sheet side, corresponding to the recess of the concavo-convex structure on the back sheet side,
  • the absorbent article according to [34] or [35] wherein the depth of the recess is deeper than the depth of the surface-side recess.
  • the space continuously extends in each of the longitudinal direction and the width direction, and the low basis weight portion in the intersection region between the space extending in the longitudinal direction and the space extending in the width direction is at a central portion of the intersection region.
  • Example 1A A sanitary napkin having the same configuration as that of the napkin 1A shown in FIGS. 1 and 2 was produced and used as a sample of Example 1A.
  • a surface sheet (details will be described later) having a two-layer structure is used as the surface sheet, a non-moisture permeable polyethylene film having a basis weight of 30 g / m 2 is used as the back sheet, and a basis weight of 20 g / using air-through nonwoven m 2, as the core wrap sheet covering the absorbent core, using absorbent paper having a basis weight of 16g / m 2.
  • an absorptive core what was manufactured according to the method mentioned above was used.
  • the absorptive core used in Example 1 is a block-type absorptive core having the same configuration (uneven structure) as the absorptive core 40A shown in FIG. 3, and exposed softwood kraft pulp (NBKP, fiber material) as the absorptive material.
  • NNKP softwood kraft pulp
  • a particulate water-absorbing polymer in a weight ratio of the former: the latter 4: 1, a mixed fiber type absorbent core, a pulp basis weight of 200 g / m 2 in the entire absorbent core, and a water-absorbing polymer basis weight 50 g / m 2 , basis weight of high basis weight part 300 g / m 2 , high basis weight part thickness 2.0 mm, low basis weight part basis weight 140 g / m 2 , low basis weight part thickness 0.8 mm,
  • the total length in the longitudinal direction was 200 mm, and the total length in the width direction was 75 mm.
  • the length L2 in the longitudinal direction see FIG.
  • the groove width L5 (see FIG. 3B) was 2 mm, and the groove depth L6 (see FIG. 5) was 0.5 mm.
  • the top sheet having a two-layer structure used in Example 1A is composed of an upper layer positioned on the skin contact surface side and a lower layer positioned on the non-skin contact surface side, and the separately manufactured upper layer and the lower layer And integrated.
  • the fused fiber is defibrated using a card machine to obtain a web using a fineness of 2.2 dtex and a fiber length of 51 mm, and then the web is heat treated by an air-through method (120 ° C.) to have a basis weight of 20 g / m 2.
  • the air-through nonwoven fabric was obtained, and the air-through nonwoven fabric was used as the upper layer.
  • the lower layer was manufactured as follows. That is, latent crimpable fiber (core-sheath type composite fiber having heat shrinkability with ethylene-propylene random copolymer as a core component and polypropylene as a sheath component, fineness of 2.2 dtex, manufactured by Daiwabo Co., Ltd.
  • a web having a basis weight of 20 g / m 2 was produced using a card machine in the same manner as described above using a starting temperature of 90 ° C. as a raw material, and the web was used as the lower layer.
  • the upper layer and the lower layer separately produced in this way are superposed to obtain a polymer, and the polymer is passed through a hot embossing roll device composed of a combination of an engraving roll and a smooth roll, and subjected to heat embossing, whereby both layers Were joined and integrated to obtain a nonwoven fabric having an embossed portion (concave portion).
  • a hot embossing roll device composed of a combination of an engraving roll and a smooth roll, and subjected to heat embossing, whereby both layers Were joined and integrated to obtain a nonwoven fabric having an embossed portion (concave portion).
  • the engraving roll was brought into contact with the lower layer, and embossing was performed from the lower layer side.
  • the engraving roll was set to 175 ° C
  • the smooth roll was set to 125 ° C.
  • the embossing pattern of the engraving roll is a so-called staggered pattern, and each embossing point constituting the pattern is circular (embossing area 0.047 cm 2 ) and the distance (pitch) of the embossing points along the machine direction is The distance (pitch) of the emboss point along the horizontal direction was 7 mm, and the distance of the emboss point along the oblique 45 ° direction was 5 mm. The embossed area ratio at this time was 7.2%.
  • the obtained nonwoven fabric was heat-treated (air-through process) for 1 to 3 minutes in a heat dryer heated to 130 ° C.
  • the fiber density of the protrusions existing on the skin contact surface is 0.04 g / cm 3
  • the fiber density of the protrusions existing on the non-skin contact surface is 0.10 g / cm 3.
  • the fiber density of the embossed part was 0.70 g / cm 3 .
  • the ratio of the total area of the embossed portion to the surface area of the topsheet (q 1) (q 2) (q 2 / q 1) was 0.29.
  • Example 2A A sanitary napkin was prepared in the same manner as in Example 1A except that the absorbent core shown below was used, and this was used as Example 2A.
  • Absorbent core used in Example 2A Absorbent in which the uneven distribution position of the low basis weight portion in the thickness direction of the absorbent core is on the non-skin contact surface side, opposite to the absorbent core used in Example 1 Core (block type absorbent core). This absorptive core is comprised similarly to the absorptive core used in Example 1A including the dimension except the above point.
  • a sanitary napkin was prepared in the same manner as in Example 1A except that the absorbent core shown below was used, and this was used as Comparative Example 1A.
  • Absorbent core used in Comparative Example 1A A plurality of absorbent portions having a predetermined basis weight (portions corresponding to high basis weight portions in the absorbent core used in Example 1A) are respectively in the longitudinal direction and the width direction of the absorbent core. The two absorbent parts adjacent to each other are spaced apart from each other, and there is no absorbent material between the two adjacent absorbent parts (ie, the absorbent used in Example 1A).
  • Absorbent core block type absorbent core in which there is no portion corresponding to the low basis weight portion in the core. This absorptive core is comprised similarly to the absorptive core used in Example 1A including the dimension except the above point.
  • Comparative Example 2A A sanitary napkin was prepared in the same manner as in Example 1A except that the absorbent core shown below was used, and this was used as Comparative Example 2A.
  • Absorbent core used in Comparative Example 2A Absorbent material is distributed over the entire core with a uniform basis weight, does not have a low basis weight part and a high basis weight part, and does not have an uneven structure. Absorbent core with flat contact surface and non-skin contact surface (flat absorbent core). This absorptive core is comprised similarly to the absorptive core used in Example 1A including the dimension except the above point.
  • the sanitary napkin was fixed to a sanitary short, and the sanitary short was attached to a dynamic model of a human body.
  • the walking motion of the dynamic model is started, and 1 minute after the start of the walking motion, as the first fluid injection operation, 2 g of horse blood is injected into the sanitary napkin from the fluid excretion point of the dynamic model.
  • Such liquid injection operation is repeated until the liquid (horse blood) exudes from the wing part of the sanitary napkin, and the maximum amount of liquid injected by the liquid injection operation performed before the liquid exudes is dynamically absorbed.
  • the amount The larger the value of the dynamic maximum absorption amount, the better the prevention of menstrual bleeding and the higher the evaluation.
  • ⁇ Flexibility evaluation method The bending stiffness of the absorbent core in the sanitary napkin is evaluated according to JIS L-1096 (General Textile Testing Method).
  • a handometer (model: HOM-3) manufactured by Daiei Scientific Instruments Co., Ltd. is used.
  • the slit width of the handometer is set to 40 mm.
  • the absorbent body (with the absorbent core coated with the core wrap sheet) is taken out from the sanitary napkin, and the hand-held meter is used to remove the absorbent body (total length in the longitudinal direction of 200 mm, width direction)
  • the absorbent body was bent in the longitudinal direction and the width direction at a portion 100 mm from the front end portion of the total length 75 mm), and the load value at that time was measured. The smaller the load value, the better the flexibility and the higher the evaluation.
  • ⁇ Breathability evaluation method From the sanitary napkin, a laminate of a top sheet and an absorbent body (with an absorbent core covered with a core wrap sheet) is taken out, and an elliptical inlet (length 5 cm, Using an acrylic plate provided with a width of 2.2 cm and an area of 11 cm 2 ), 6 g of blood clot is injected from the injection port and then left for 1 minute. Thereafter, the surface sheet was removed from the laminate, and the remaining absorbent was used as an evaluation sample to evaluate the air permeability. The air permeability was evaluated by referring to “Paper and paperboard—Air permeability test method—Gurley test machine method” prescribed in JIS P8117 (1998).
  • Gurley test machine B type (trade name “GURLEY DENSOMETER”, Osamu Kumagai Performed by Kogyo Kogyo Co., Ltd.). Specifically, as shown in FIG. 11, an evaluation sample 90 (with an absorbent core covered with a core wrap sheet) is placed between two acrylic plates 91 and 92 having a square shape of 50 mm in length and width. It is set on the Gurley tester with the skin contact surface of 90 in contact with one acrylic plate 91 located on the air injection side. One acrylic plate 91 has a square-shaped through hole 93 of 10 mm in length and width passing through the acrylic plate 91 in the thickness direction, whereas the other acrylic plate 92 has a through hole. Not done.
  • the weight of one acrylic plate 91 is 9.7 g, and the size of the evaluation sample 90 exceeds the size of the acrylic plates 91 and 92. Then, the time required for 300 ml of air to pass (time required for injection, seconds) was measured by the method described in JIS P8117 (1998), and the ventilation rate (ml / second) was calculated from the measured value. The greater the value of this ventilation rate, the better the air permeability and the higher the evaluation.
  • Examples 1A and 2A had a larger value of dynamic maximum absorption than Comparative Examples 1A and 2A, were excellent in prevention of menstrual blood leakage, and were bent. When the load value was small, the flexibility was excellent. From this result, as described above, forming a groove with a specific structure in an absorbent core (block-type absorbent core) in which a low basis weight part and a high basis weight part are formed in a specific pattern, It was suggested that it is effective in obtaining an absorbent article that excels in absorption and diffusion of excretory fluids and is less likely to cause discomfort due to wetness of the wearer.
  • the block-type absorbent core having a concavo-convex structure is superior in air permeability as compared to a flat-type absorbent core having no concavo-convex structure. It was suggested that the ventilation effect of the air existing between the skin of the napkin wearer and the napkin is excellent.
  • Example 1B A sanitary napkin having the same configuration as that of the napkin 1B shown in FIGS. 12 and 13 was produced and used as a sample of Example 1B.
  • a surface sheet having a two-layer structure is used as the surface sheet, a non-moisture permeable polyethylene film having a basis weight of 30 g / m 2 is used as the back sheet, and an air-through nonwoven fabric having a basis weight of 20 g / m 2 is used as the side sheet.
  • As a core wrap sheet for covering the absorbent core an absorbent paper having a basis weight of 16 g / m 2 was used.
  • As an absorptive core what was manufactured according to the method mentioned above was used.
  • the absorptive core used in Example 1B has the same configuration (uneven structure) as the absorptive core 40B shown in FIG. 14, and as absorptive material, softwood bleached kraft pulp (NBKP, fiber material) and particulate
  • NNKP softwood bleached kraft pulp
  • This is a mixed fiber type absorbent core containing a water-absorbing polymer in a weight ratio of the former: latter 4: 1, and has a pulp basis weight of 200 g / m 2 and a water-absorbing polymer basis weight of 50 g / m in the entire absorbent core.
  • Example 1B Example 1B except that the absorbent core shown below was used, and the length L8 of the shallow groove and the length L9 of the deep groove were 1.2 mm, respectively. Similarly, a sanitary napkin was prepared and used as Comparative Example 1B.
  • Absorbent core used in Comparative Example 1B Absorbent material is distributed over the entire core with a uniform basis weight, does not have a low basis weight part and a high basis weight part, and does not have an uneven structure. Absorbent core with substantially flat contact and non-skin contact surfaces. This absorptive core is comprised similarly to the absorptive core used in Example 1B including the dimension except the above point.
  • Example 2B A sanitary napkin was prepared in the same manner as in Example 1B except that the same absorbent core as that used in Comparative Example 1B was used as the absorbent core, and this was used as Comparative Example 2B.
  • Example 1B has a larger value of dynamic maximum absorption than Comparative Examples 1B and 2B, which is excellent in preventing menstrual blood leakage, and when folded.
  • the load value was small and the flexibility was excellent.
  • forming a groove with a specific structure in an absorbent core in which a low basis weight part and a high basis weight part are formed in a specific pattern absorbs and diffuses excretory fluid quickly. It is suggested that it is effective in eliminating the discomfort caused by the wearer's wetting and obtaining an absorbent article having moderate flexibility and excellent fit despite having a leak-proof groove. It was done.

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

Abstract

Dans un article absorbant (1), un absorbant (4) est constitué d'une âme absorbante (40) contenant un matériau absorbant. L'âme absorbante (40) a des parties de poids élevé (41) contenant une quantité relativement importante du matériau absorbant et des parties de faible poids (42) contenant une quantité relativement petite du matériau absorbant et les parties de poids élevé (41) et les parties de faible poids (42) sont formées de manière alternée à la fois dans la direction dans le sens de la longueur (X) et dans la direction dans le sens de la largeur (Y) de l'article absorbant (1). Dans l'article absorbant (2), une rainure (7) est formée par façonnage de manière concave d'une feuille de face avant (2) conjointement avec l'âme absorbante (40). La rainure (7) est au moins constituée d'une rangée de deux parties de poids élevé (41) et (41) et d'une partie de faible poids (42), ladite partie de faible poids (42) étant positionnée entre lesdites deux parties de poids élevé (41) et (41), qui sont alignées dans la direction dans le sens de la longueur (X) ou dans la direction dans le sens de la largeur (Y). Une partie de paroi inférieure (71) constituant la rainure (7) est positionnée plus proche du côté de face sans contact avec la peau (4b) que le centre de direction d'épaisseur (Tc) de l'âme absorbante (40).
PCT/JP2012/063467 2011-05-27 2012-05-25 Article absorbant WO2012165327A1 (fr)

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CN201280025811.6A CN103561703B (zh) 2011-05-27 2012-05-25 吸收性物品
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JP2011-118621 2011-05-27
JP2011118620 2011-05-27
JP2011-118620 2011-05-27
JP2011118621A JP5552091B2 (ja) 2011-05-27 2011-05-27 吸収性物品
JP2011198000A JP5604393B2 (ja) 2011-09-12 2011-09-12 吸収性物品
JP2011-198000 2011-09-12
JP2011-209339 2011-09-26
JP2011209339A JP5779464B2 (ja) 2011-09-26 2011-09-26 吸収性物品
JP2012-088729 2012-04-09
JP2012088729A JP2013009946A (ja) 2011-05-27 2012-04-09 吸収性物品

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Publication number Priority date Publication date Assignee Title
WO2015012155A1 (fr) * 2013-07-26 2015-01-29 花王株式会社 Article absorbant
JP2015100574A (ja) * 2013-11-26 2015-06-04 花王株式会社 吸収性物品
US9987176B2 (en) 2013-08-27 2018-06-05 The Procter & Gamble Company Absorbent articles with channels
US10022280B2 (en) 2012-12-10 2018-07-17 The Procter & Gamble Company Absorbent article with high absorbent material content
US10231883B2 (en) 2015-01-23 2019-03-19 Kimberly-Clark Worldwide, Inc. Bridged absorbent structure
US10335324B2 (en) 2013-08-27 2019-07-02 The Procter & Gamble Company Absorbent articles with channels

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WO2001054640A1 (fr) * 2000-01-26 2001-08-02 Toyo Eizai Kabushiki Kaisha Article utilisable dans des vetements jetables
JP2002165835A (ja) * 2000-11-30 2002-06-11 Uni Charm Corp 使い捨ておむつ
JP2004154153A (ja) * 2002-09-09 2004-06-03 Uni Charm Corp 可撓軸を備えた吸収性物品
WO2010134456A1 (fr) * 2009-05-20 2010-11-25 花王株式会社 Corps absorbant et article absorbant
JP2012130363A (ja) * 2010-12-17 2012-07-12 Kao Corp 吸収性物品

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Publication number Priority date Publication date Assignee Title
WO2001054640A1 (fr) * 2000-01-26 2001-08-02 Toyo Eizai Kabushiki Kaisha Article utilisable dans des vetements jetables
JP2002165835A (ja) * 2000-11-30 2002-06-11 Uni Charm Corp 使い捨ておむつ
JP2004154153A (ja) * 2002-09-09 2004-06-03 Uni Charm Corp 可撓軸を備えた吸収性物品
WO2010134456A1 (fr) * 2009-05-20 2010-11-25 花王株式会社 Corps absorbant et article absorbant
JP2012130363A (ja) * 2010-12-17 2012-07-12 Kao Corp 吸収性物品

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10022280B2 (en) 2012-12-10 2018-07-17 The Procter & Gamble Company Absorbent article with high absorbent material content
WO2015012155A1 (fr) * 2013-07-26 2015-01-29 花王株式会社 Article absorbant
JP2015042244A (ja) * 2013-07-26 2015-03-05 花王株式会社 吸収性物品
CN105407845A (zh) * 2013-07-26 2016-03-16 花王株式会社 吸收性物品
US9987176B2 (en) 2013-08-27 2018-06-05 The Procter & Gamble Company Absorbent articles with channels
US10335324B2 (en) 2013-08-27 2019-07-02 The Procter & Gamble Company Absorbent articles with channels
US10736794B2 (en) 2013-08-27 2020-08-11 The Procter & Gamble Company Absorbent articles with channels
US11406544B2 (en) 2013-08-27 2022-08-09 The Procter & Gamble Company Absorbent articles with channels
US11612523B2 (en) 2013-08-27 2023-03-28 The Procter & Gamble Company Absorbent articles with channels
US11759376B2 (en) 2013-08-27 2023-09-19 The Procter & Gamble Company Absorbent articles with channels
JP2015100574A (ja) * 2013-11-26 2015-06-04 花王株式会社 吸収性物品
US10231883B2 (en) 2015-01-23 2019-03-19 Kimberly-Clark Worldwide, Inc. Bridged absorbent structure

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