WO2016067965A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2016067965A1
WO2016067965A1 PCT/JP2015/079509 JP2015079509W WO2016067965A1 WO 2016067965 A1 WO2016067965 A1 WO 2016067965A1 JP 2015079509 W JP2015079509 W JP 2015079509W WO 2016067965 A1 WO2016067965 A1 WO 2016067965A1
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WO
WIPO (PCT)
Prior art keywords
region
absorbent
basis weight
absorbent article
skin
Prior art date
Application number
PCT/JP2015/079509
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
達之 山口
啓介 長島
学 松井
祐貴 塚本
Original Assignee
花王株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to CN201580055603.4A priority Critical patent/CN106794085B/zh
Publication of WO2016067965A1 publication Critical patent/WO2016067965A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • 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
    • A61F13/539—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 characterised by the connection of the absorbent layers with each other or with the outer layers

Definitions

  • the present invention relates to absorbent articles such as sanitary napkins, panty liners (orimono sheets), and incontinence pads.
  • Patent Documents 1 and 2 disclose an absorber having a raised portion having a groove near the center of the absorber.
  • the present invention includes an absorbent body including an absorbent core having a vertically long shape that is long in the front-rear direction of an absorbent article, between a skin-side sheet that forms a skin-facing surface and a non-skin-side sheet that forms a non-skin-facing surface.
  • the present invention relates to an absorbent article.
  • the absorbent core has a side region located on both sides in the width direction, and a central region located on the center side in the width direction than the side region and thicker than the side region, in the excretory part facing part. Have.
  • the lateral region and the central region are integrally formed, and the central region protrudes toward the non-skin side sheet.
  • the absorber has a non-joining region that is not joined to the non-skin side sheet in a region where the side region is present in plan view.
  • FIG. 1 is a perspective view showing a sanitary napkin according to a first embodiment of the present invention.
  • 2A is a cross-sectional view taken along the line IIa-IIa in FIG. 1
  • FIG. 2B is a cross-sectional view taken along the line IIb-IIb in FIG. 3 is a plan view of the absorbent body of the sanitary napkin shown in FIG. 1 viewed from the non-skin facing surface side.
  • FIG. 4 is an explanatory diagram showing an example of a method for pressurizing both side portions of the central thick region to form a protrusion-adjacent high density portion having a density higher than that of the central protrusion and a higher basis weight than that of the side region.
  • FIG. 4 is an explanatory diagram showing an example of a method for pressurizing both side portions of the central thick region to form a protrusion-adjacent high density portion having a density higher than that of the central protrusion and a higher basis weight than that of the side region
  • FIG. 5 is a schematic view showing a deformed state of the absorbent body when the sanitary napkin of FIG. 1 is worn.
  • FIG. 6 is a schematic view showing a main part of a fiber stacking apparatus preferably used for manufacturing the absorbent core of the sanitary napkin shown in FIG.
  • FIG. 7A and FIG. 7B are schematic views showing a cross section along the drum circumferential direction of the outer peripheral portion of the fiber stacking drum in the fiber stacking apparatus shown in FIG.
  • the absorber in Patent Document 1 has a laminated structure having an upper layer and a lower layer, and a depression extending over the upper and lower layers is formed in a central region where the upper layer exists and forms a raised portion.
  • the recess is formed by hot embossing, and since the vicinity of the bottom of the recess is consolidated, there is room for improvement in terms of soft followability to the wearer's movement.
  • the protruding part which similarly consists of many convex parts is provided in the absorber which has many block-shaped convex parts, and a protruding part becomes easy to follow a wearer's operation
  • an object of the present invention is to provide an absorbent article that can further enhance the performance of the above-described prior art.
  • a sanitary napkin 1 (hereinafter also simply referred to as napkin 1) as a first embodiment of the absorbent article of the present invention is a night napkin suitable for use at bedtime, and preferably has a length of 30 cm or more. belongs to.
  • the napkin 1 has an absorbent main body 6 that is long in the front-rear direction, a pair of wing portions 7, 7, and a pair of rear flap portions 8, 8.
  • the “front-rear direction” is a direction that coincides with the wearer's front-rear direction when worn.
  • the front-back direction is a longitudinal direction, and the direction orthogonal to this is called a width direction.
  • the napkin 1 has the front part A, the excretion part opposing part B, and the rear part C in the longitudinal direction, and a pair of wing parts 7, 7 on the left and right sides of the absorbent main body 6 in the excretion part opposing part B, A pair of rear flap portions 8 and 8 are provided on the left and right sides of the absorbent main body 6 in the rear portion C.
  • the excretory part facing part B is a part disposed opposite to the liquid excretion part whose central part in the width direction is the vaginal opening of the wearer, and the front part A is The rear part B is a part arranged on the back side of the wearer from the excretion part facing part B.
  • the napkin 1 includes a skin-side sheet 2 that forms a skin-facing surface that faces the wearer's skin when worn, a non-skin-side sheet 3 that forms a non-skin-facing surface that faces the clothing side such as shorts, and the like.
  • An absorbent body 4 disposed between the two sheets 2 and 3 is provided.
  • seat 3, and the absorptive core 40 has overlapped with planar view is called the absorptive main body 6.
  • the skin side sheet 2 includes a liquid permeable top sheet 2a and a pair of side sheets 2b and 2b joined to both sides thereof.
  • the liquid permeable top sheet 2 a is arranged at the center in the width direction Y of the absorbent main body 6 so as to extend over the entire length of the absorbent main body 6.
  • the side sheet 2b is joined to the top sheet 2a at a position slightly outward in the width direction from the side edge 21 in a state where the side edge 21 on the center side in the width direction of the absorbent main body is overlapped on the top sheet 2a.
  • the side sheet 2b is not joined to the top sheet 2a at the inner end in the width direction along the longitudinal direction.
  • the elastic member is not provided in the width direction inner side edge part of the side seat
  • an elastic member for forming a three-dimensional guard is provided in the vicinity of the side edge portion 21, and when worn, a portion having a predetermined width from the side edge portion 21 in the excretory portion facing portion B due to the contraction force of the elastic member. May stand up from the top sheet 2a to form a three-dimensional guard.
  • the pair of wing portions 7, 7 and the pair of rear flap portions 8, 8 are composed of a side sheet 2 b and a non-skin side sheet 3 extending from both side edges of the absorbent body 4.
  • the non-skin side sheet 3 of each pair of wings 7 is provided with a non-skin wing adhesive for fixing to the non-skin facing surface of the crotch part of the shorts.
  • a main body adhesive portion (not shown) for fixing the main body 6 to the inner surface of the shorts is provided on the facing surface.
  • the main body adhesive portion is provided at least in a region overlapping with a side region of the absorbent core 4 described later in plan view.
  • the rear flap 8 is disposed on the inner surface of the shorts when worn.
  • an adhesive portion for fixing to the inner surface of the shorts is also provided on the surface of the rear flap portion 8 made of the non-skin side sheet 3.
  • the skin-side sheet 2 and the non-skin-side sheet 3 are bonded to each other with adhesives at the outer peripheral portions of the absorbent body 4 and bonded together by heat sealing at the peripheral portion of the napkin 1.
  • the skin-side sheet 2 and the absorbent body 4 and the absorbent body 4 and the non-skin-side sheet 3 are joined to each other by a pattern-coated adhesive such as dots, spirals, and stripes. .
  • the surface on the non-skin contact surface side of the absorbent body 4 has a non-joining region that is not joined to the non-skin-side sheet in a region where a side region 45 of the absorbent core 40 described later is present. .
  • the absorbent body 4 in the napkin 1 includes a vertically long absorbent core 40 that is long in the front-rear direction of the napkin.
  • the absorptive core 40 consists of the fiber aggregate which consists of fiber materials, such as a pulp fiber, or what hold
  • the absorbent body 4 includes a core wrap sheet (not shown) that wraps the absorbent core 40. That is, the upper and lower surfaces of the absorbent core 40 are covered with a core wrap sheet (not shown) made of tissue paper or a water-permeable nonwoven fabric.
  • the core wrap sheet is used for the purpose of preventing leakage of the forming material of the absorbent core 40 or improving the shape retention of the absorbent core 40.
  • the cross-section in the width direction of the absorbent core 40 is covered over the entire circumference by a single core wrap sheet, or in the width direction of the absorbent core 40 by a plurality of core wrap sheets. It is preferable that the cross section is covered over the entire circumference.
  • both sides of one rectangular core wrap sheet placed on the skin facing surface or the non-skin facing surface of the absorbent core 40 are folded back to the other surface side of the absorbent core 40 to cover the other surface. It is also preferable to be laminated on both sides of another rectangular core wrap sheet.
  • the sheets of the stacked portions may not be joined, but are preferably bonded.
  • the absorbent core 40 in the napkin 1 has a vertically long shape that is long in the same direction as the front-rear direction of the napkin 1. Moreover, the absorptive core 40 is located in the width direction Y in the width direction Y as shown in FIG. 2A and FIG. 45 and a central region 41 having a thickness larger than 45.
  • the central region 41 is a central protruding portion that protrudes downward on the non-skin side sheet 3, that is, the lower surface S2, S2 of each of the side regions 45, 45. 5 is a region having 5.
  • the side regions 45, 45 and the central region 41 are integrally formed.
  • integrated molding means that one member is manufactured using the same material, but different from members manufactured in separate steps by bonding means such as an adhesive or compression. It means that it is integrally formed. Accordingly, there are no adjacent portions or coupling portions between the cores produced when two separately manufactured absorbent cores are arranged side by side at the boundary between the central region 41 and the side regions 45 and 45.
  • the napkin 1 of this embodiment since the whole absorptive core 40 is integrally molded, between the part 42d which forms the center protrusion part 5 in the center area
  • the width W1 of the central protrusion 5 is preferably 20% or more, more preferably 30% or more, and preferably 80% or less, with respect to the total width W2 of the absorbent core 40. More preferably, it is 70% or less, preferably 20% or more and 80% or less, more preferably 30% or more and 70% or less.
  • the width W1 of the central protruding portion 5 is the length in the width direction.
  • the full width W2 of the absorbent core 40 which indicates the length of the longest portion and is compared with the width thereof, is the full width at the same position in the longitudinal direction of the absorbent core 40.
  • the central protruding portion 5 of the absorbent core 40 in the napkin 1 has a long shape in the longitudinal direction of the absorbent core 40, and the rear portion C from the excretory portion facing portion B of the napkin 1. It is formed over a part of. More specifically, it is formed in the range from the vicinity of the front end portion of the excretion portion facing portion B to the vicinity of the central portion in the X direction of the rear portion C.
  • the central protruding portion 5 is preferably formed from the excretory portion facing portion B to a part of the rear portion C in the front-rear direction X of the napkin 1 (absorbent article).
  • the central protrusion 5 is preferably formed over a length of 30% or more of the total length of the napkin 1 in the front-rear direction X, and is formed over a length of 40% or more of the total length of the napkin 1. It is more preferable that it is formed over a length of 50% or more of the total length of the napkin 1. The same applies to the longitudinal grooves 50 and the high-density portions 12 described later.
  • a longitudinal groove having a bottom portion on the skin facing surface side along the longitudinal direction X of the absorbent core 40. 50 is formed. That is, the vertical groove 50 is a groove that has an opening 50 a on the non-skin facing surface side of the absorbent core 40 and does not penetrate the absorbent core 40.
  • the longitudinal groove 50 is formed by reducing the basis weight of the absorbent material of the absorbent core 40. That is, the vertical groove 50 of the napkin 1 is not formed by compressing a part of the absorbent core 40 by embossing or the like.
  • the number of the longitudinal grooves 50 provided in the central projecting portion 5 is one, but the number of the longitudinal grooves provided in the central projecting portion 5 is not limited thereto, and is intermittent in the width direction Y. A plurality of them may be provided.
  • the vertical groove 50 is arranged so as to cut the central protrusion 5 vertically along the longitudinal direction of the central protrusion 5.
  • a lateral groove 44a having a bottom portion on the skin facing surface side, which is formed by reducing the basis weight of the forming material of the absorbent core 40 as in the case of the longitudinal groove 50, is formed.
  • the horizontal groove 44 a is a groove that includes an opening on the non-skin facing surface side of the central region 41 and does not penetrate the absorbent core 40.
  • the lateral groove 44 a extends along the width direction Y of the absorbent core 40.
  • a plurality of lateral grooves 44 a are intermittently provided in the central region 41 in the longitudinal direction X.
  • the lateral groove 44 a is provided so as to cross the central protrusion 5 along the width direction Y of the central protrusion 5.
  • a high basis weight portion 42 and a low basis weight portion 43 that forms the bottom of the longitudinal groove 50 are formed in the width direction Y of the absorbent core 40.
  • the low basis weight portions 43 extend along the longitudinal direction X of the absorbent core 40.
  • the high basis weight part 42 is a part where the basis weight of the absorbent core forming material is relatively higher than the low basis weight part 43, and the low basis weight part 43 is the basis weight of the absorbent core forming material. Is a relatively low portion compared to the high basis weight portion 42.
  • the basis weight of the low basis weight portion 43 forming the bottom of the longitudinal groove 50 is preferably a ratio of 5% or more, more preferably 10%, to the basis weight of the high basis weight portion 42. In addition, it is preferably 80% or less, more preferably 70% or less, preferably 5% or more and 80% or less, and more preferably 10% or more and 70% or less.
  • the basis weight of the high basis weight portion 42 is preferably 200 g / m 2 or more, more preferably 300 g / m 2 or more, and preferably 800 g / m 2 or less, more preferably 700 g / m 2 or less.
  • the basis weight of the low basis weight portion 43 is preferably 10 g / m 2 or more, more preferably 15 g / m 2 or more, and preferably 400 g / m 2 or less, more preferably 350 g / m 2 or less. It is more preferably at 10 g / m 2 or more 400 g / m 2 or less and preferably, 25 g / m 2 or more 350 g / m 2 or less.
  • the high basis weight portion 42 not only has a larger basis weight than the low basis weight portion 43 that forms the bottom of the longitudinal groove 50, but also has a larger thickness.
  • the thickness of the low basis weight portion 43 is such that the ratio to the thickness of the high basis weight portion 42 is preferably 5% or more, more preferably 10% or more, and preferably 50% or less, more preferably 40% or less. In addition, it is preferably 5% or more and 50% or less, and more preferably 10% or more and 40% or less.
  • the thickness of the high basis weight portion 42 is preferably 1.5 mm or more, more preferably 2 mm or more, preferably 10 mm or less, more preferably 8 mm or less, and 1.5 mm or more and 10 mm or less.
  • the thickness of the low basis weight portion 43 is preferably 0.08 mm or more, more preferably 0.15 mm or more, preferably 5 mm or less, more preferably 4 mm or less, and 0.08 mm or more and 5 mm or less. It is preferable that it is 0.15 mm or more and 4 mm or less.
  • the value of the high basic weight part 42 mentioned above, and the various values in the relationship with the low basic weight part 43 are the case where the absorptive core is comprised including the horizontal groove 44a like the napkin 1 of this embodiment. May correspond to the high basis weight portion not including the lateral groove 44a.
  • the absorbent core 40 is cut along a boundary line between the high basis weight portion 42 and the low basis weight portion 43 using a single blade razor manufactured by Feather Co., and small pieces of the high basis weight portion 42 and the low basis weight portion 43 are obtained.
  • the high basis weight portion 42 cuts out a portion sandwiched between the side region 45 and the low basis weight portion 43 or a portion sandwiched between the pair of low basis weight portions 43 and 43 as small pieces so as to have a predetermined area. .
  • the small piece includes the low basis weight portion 48 that forms the bottom of the lateral groove 44a extending in the width direction Y, the boundary between the high basis weight portion 42 and the side region 45, the low basis weight portion 43, or the low basis weight portion 48.
  • the portion surrounded by the line is cut out using the high basis weight portion 42 as a small piece and used for measurement.
  • the small piece of the low basic weight part 43 cuts out the narrow part pinched
  • a small piece of 30 mm is cut out and used as a small piece of the low basis weight portion 43.
  • the weights of these pieces are measured using an electronic balance (an electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point).
  • the calculated basis weight is calculated by dividing the obtained weight by the area of the small basis weight portion 42 or the low basis weight portion 43. About each of the high basic weight part 42 and the low basic weight part 43, let the average of the basic weight of five small pieces be a basic weight.
  • the measurement of the thickness of the high basic weight part 42 and the low basic weight part 43 is performed by measuring the thickness of the small piece cut out in order to measure a basic weight about each site
  • An acrylic plate having a size of 20 mm ⁇ 20 mm and a thickness of 3 mm is placed so that the center thereof coincides with the center of the small piece, and a non-contact type laser displacement meter (laser head LK-G30, displacement meter LK-GD500 manufactured by KEYENCE) Measure the thickness of the sample.
  • the pressure during thickness measurement is 0.5 g / cm 2 .
  • the section of the cut sample is 20 to 100 using, for example, a microscope (VHX-1000 manufactured by KEYENCE). You may observe and measure at double magnification.
  • the high basis weight portion 42 has a higher density of the absorbent member than the low basis weight portion 43 that forms the bottom of the longitudinal groove 50.
  • Such a configuration is obtained, for example, by pressing the central region 41 of the absorbent core 40 in the process of manufacturing the absorbent core 40.
  • the pressure by a press concentrates on the thick high basic weight part 42, and the thin low basic weight part 43 does not receive a pressure by a press and is not compressed.
  • the high basis weight portion 42 is designed so that the density of the absorbent member is increased with respect to the low basis weight portion 43 by compressing only the high basis weight portion 42.
  • high basis weight portions 42 and low basis weight portions 48 that form the bottoms of the lateral grooves 44 a are alternately formed in the longitudinal direction X of the absorbent core 40.
  • the high basis weight portion 42 has a higher density of the absorbent member in comparison with the low basis weight portion 48 that forms the bottom of the lateral groove 44a.
  • a density is calculated by using the basic weight and thickness obtained based on the measuring method mentioned above.
  • the basis weight and thickness of the low basis weight part 48 are measured by cutting out small pieces in the same manner as in the case of the low basis weight part 43.
  • the small piece of the low basic weight part 48 cuts out the narrow part pinched
  • the above-described preferable basis weight ratio, thickness ratio, and the like of the high basis weight portion 42 and the low basis weight portion 43 are the same between the high basis weight portion 42 and the low basis weight portion 48.
  • the high basic weight part 42 and the low basic weight part 43 which have a basis weight difference and a density difference are formed in said aspect,
  • region 5 of the absorptive core 40 Longitudinal grooves 50 that are recessed toward the skin facing surface are formed to extend in the longitudinal direction X of the absorbent core 40.
  • the skin facing surface is a surface that is directed to the skin side of the wearer when worn in the absorbent article or a component thereof, and the non-skin facing surface is the wearer when worn in the absorbent article or a component thereof. It is the surface that faces the other side of the skin.
  • the high basis weight portion 46 and the low basis weight portion 47 are alternately formed in the lateral direction Y of the absorbent core 40 in the side region 45 of the absorbent core 40.
  • the individual low basis weight portions 47 extend along the longitudinal direction X of the absorbent core 40.
  • the high basis weight portion 46 has a relatively high basis weight of the absorbent core forming material as compared to the low basis weight portion 47, and the low basis weight portion 47 has a high basis weight of the absorbent core forming material.
  • the basis weight is relatively low as compared with the amount portion 46.
  • the high basic weight part 46 and the low basic weight part 47 which have a basic weight difference and a density difference are formed in said aspect, On the non-skin opposing surface in the side area
  • the high basis weight portion 46 has a higher density of the absorbent member than the low basis weight portion 47 that forms the bottom of the longitudinal groove 52.
  • Such a configuration can be obtained as follows.
  • the side region 45 of the absorbent core 40 is pressed in a step different from the step of pressing the central region 41.
  • the pressure by the press is concentrated on the thick high basis weight portion 46, and the low low basis weight portion 47 is not compressed by the press and is not compressed.
  • the high basis weight part 46 is designed so that the density of the absorbent member is increased with respect to the low basis weight part 47 by compressing only the high basis weight part 46.
  • the press process used in this process is a measure such as using a press roll cut into a shape corresponding to the central region 41 or a roll having a press portion only in a portion corresponding to the side region 45 of the absorbent core 40. It is devised that only the side region of the absorbent core 40 is pressed.
  • the basis weight of the low basis weight portion 47 forming the bottom of the lateral longitudinal groove 52 is preferably 5% or more, and more preferably, the ratio of the high basis weight portion 46 to the basis weight. Is 10% or more, preferably 50% or less, more preferably 40% or less, preferably 5% or more and 50% or less, more preferably 10% or more and 40% or less.
  • the basis weight of the high basis weight portion 46 is preferably 50 g / m 2 or more, more preferably 100 g / m 2 or more, and preferably 400 g / m 2 or less, more preferably 300 g / m 2 or less.
  • the basis weight of the low basis weight portion 47 is preferably 2.5 g / m 2 or more, more preferably 5 g / m 2 or more, and preferably 200 g / m 2 or less, more preferably 150 g / m 2 or less. In addition, it is preferably 2.5 g / m 2 or more and 200 g / m 2 or less, and more preferably 5 g / m 2 or more and 150 g / m 2 or less.
  • the high basis weight portion 46 not only has a larger basis weight than the low basis weight portion 47 that forms the bottom of the lateral longitudinal groove 52, but also has a larger thickness.
  • the thickness of the low basis weight portion 47 is such that the ratio to the thickness of the high basis weight portion 46 is preferably 5% or more, more preferably 10% or more, and preferably 50% or less, more preferably 40% or less. In addition, it is preferably 5% or more and 50% or less, and more preferably 10% or more and 40% or less.
  • the thickness of the high basis weight portion 46 is preferably 0.8 mm or more, more preferably 1 mm or more, preferably 5 mm or less, more preferably 4 mm or less, and 0.8 mm or more and 5 mm or less. It is preferable that it is 1 mm or more and 4 mm or less.
  • the thickness of the low basis weight portion 47 is preferably 0.04 mm or more, more preferably 0.08 mm or more, preferably 0.4 mm or less, more preferably 0.32 mm or less, and 0.04 mm. It is preferably 0.4 mm or less and more preferably 0.08 mm or more and 0.32 mm or less.
  • the value in the relationship with the high basic weight part 46 mentioned above and the low basic weight part 47 is the case where the absorptive core is comprised including the horizontal groove 44b like the napkin 1 of this embodiment. May correspond to a high basis weight part not including the lateral groove 44b.
  • the measuring method of the basic weight and thickness in each of the high basic weight part 46 and the low basic weight part 47 is performed similarly to the measuring method in the high basic weight part 42 and the low basic weight part 43 mentioned above.
  • the high basis weight portion 42 in the central region 41 where the central protrusion 5 exists has a larger basis weight than the high basis weight portion 46 in the side region 45, and the high basis weight of the side region 45.
  • the thickness is larger than that of the portion 46.
  • the thickness t1 of the central region 41 is thicker than the thickness t2 of the side region 45, and the central protruding portion 5 that protrudes downward from the lower surface S2 of the side region 45 is formed in the central region 41.
  • the ratio of the thickness t1 of the central region 41 to the thickness t2 of the side region 45 is preferably 110% or more, more preferably 120% or more, and preferably 400% or less, more preferably 300% or less. Also, it is preferably 110% or more and 400% or less, and more preferably 120% or more and 300% or less.
  • the thickness t1 of the central region 41 is the thickness of the high basis weight portion 42 located in the central portion in the width direction of the central region 41, and the thickness t2 of the side region 45 is in the central region 41. This is the thickness of the closest high basis weight portion 46.
  • the thickness of the high basis weight portion 46 closest to the protruding portion adjacent high density portion 12 is set.
  • the ratio of the height t protruding from the lower surface S2 of the lateral region 45 to the total thickness t1 of the central region 41 is preferably 20% in the central protruding portion 5 in both the excretory portion facing portion B and the rear portion C. Or more, more preferably 30% or more, preferably 90% or less, more preferably 80% or less, preferably 20% or more and 90% or less, more preferably 30% or more and 80% or less. It is.
  • the protruding height t of the central protruding portion 5 is the same as the value obtained by subtracting the thickness t2 of the side region 45 from the total thickness t1 of the central region 41.
  • the high basis weight portions 46 and the low basis weight portions 49 are alternately formed in the longitudinal direction X of the absorbent core 40 in the lateral region 45, and the individual low basis weight portions 49 are
  • the absorbent core 40 extends along the width direction Y.
  • a plurality of lateral grooves 44 b are intermittently arranged in the lateral region 45 in the longitudinal direction X.
  • the low basis weight portion 48 of the central region 41 and the low basis weight portion 49 of the side region 45 match the position in the longitudinal direction X of the absorbent core 40 at the boundary between the central region 41 and the side region 45.
  • the lateral groove 44a of the central region 41 and the lateral groove 44b of the side regions 45, 45 are coincident with each other at the boundary portion in the longitudinal direction X of the absorbent core 40. That is, the lateral groove 44a of the central region 41 and the lateral groove 44b of the lateral regions 45, 45 are formed from the central region 41 of the absorbent core 40 to the lateral region 45 when the absorbent core 40 is viewed in plan from the non-skin facing surface side. , 45 is formed as one continuous groove 44, which extends over the entire width of the absorbent core 40. A plurality of lateral grooves 44 are formed at intervals in the longitudinal direction of the absorbent core 40.
  • the low basis weight portion 43 of the central region 41 and the low basis weight portion 47 of the side region 45 form a single low basis weight portion that extends continuously over the entire width of the absorbent core 40.
  • the single low basis weight part has a smaller basis weight, thickness and density of the absorbent core forming material than the high basis weight part 46 of the side region 45.
  • Concerning the lateral groove 44, continuous from the central region to the lateral region means that when the absorbent core 40 is viewed in plan from the non-skin facing surface side, the lateral groove is not interrupted between the central region and the lateral region. It means to exist continuously from the central region to the side region.
  • the horizontal groove 44 intersects the vertical groove 50 in a cross shape in plan view, but the other horizontal groove is on the extension of the space in the horizontal groove on one side facing the vertical groove.
  • the transverse groove is not interrupted at the intersection with the longitudinal groove.
  • the absorbent body 4 in the napkin 1 is joined to the non-skin-side sheet 3 in a region 45 ′ (hereinafter also referred to as an absorbent side region 45 ′) where the side region 45 of the absorbent core 40 exists in plan view. It has a non-bonded area.
  • the absorbent body 4 is joined to the non-skin-side sheet 3 in a region 41 ′ (hereinafter also referred to as a central region 41 ′ of the absorbent body) where the central protrusion 5 of the absorbent core 40 is present in plan view. Yes.
  • a space is formed between the absorbent core 40 and the non-skin side sheet 3 in the side region 45 ′ of the absorbent body 4.
  • this space may be formed between the absorbent core and the core wrap sheet, or between the core wrap sheet and the non-skin side sheet 3. Although it may be formed, it is preferable that a space is formed between the core wrap sheet and the non-skin side sheet 3. In that case, between the absorptive core 40 and a core wrap sheet
  • the surface of the absorbent core 40 on the non-skin facing surface side may be bonded to the core wrap sheet and an adhesive that is pattern-coated over the entire area. Moreover, the surface at the skin contact surface side of the absorptive core 40 may be bonded to the core wrap sheet and a pattern-coated adhesive over the entire area.
  • a non-joining region exists over the entire width direction of the side region 45 ′ of the absorbent body 4 positioned on the outer side in the width direction in the region where the central protrusion 5 exists, and in FIG. Side region 45 'overlaps the non-bonded region.
  • the present invention is not limited to this, and a part of the region 45 ′ where the side region 45 exists in the plan view of the absorber 4 may be joined to the non-skin side sheet 3.
  • seat are mentioned.
  • seat 3 may be sufficient.
  • the central protruding portion 5 has an oblong shape or the like, and the width thereof is not uniform, the lateral region on the inner side in the width direction is located forward or backward in the longitudinal direction from the maximum width portion of the central protruding portion 5.
  • seat 3 of the absorber 4 are joined, and a non-joining area
  • the central region 41 and the side regions 45 are integrally formed, and the central protrusion 5 of the central region 41 having a relatively thick thickness is a non-skin side sheet. Projects toward the 3 side. And in the side area
  • the side regions 45 ′ and 45 ′ of the absorbent body 4 are bent while having a buffer region between the central region 41 ′ and the crotch region, so that it is possible to form a deformed shape with excellent cushioning properties. (See FIG. 5).
  • the area for buffering pressure is a space formed between the side area 45 ′ of the absorbent body 4 and the non-skin side sheet 3.
  • the side region 45 ′ is bent and moved toward the non-skin facing surface side.
  • a region adjacent to the central protrusion 5 in the region 45 ′ can easily maintain a space between the side region 45 ′ and the non-skin side sheet 3.
  • channel are further formed in the center area
  • the buffer region can be formed so as to maintain the space between the central protrusion 5 and the side region 45 ', the buffer region has a large absorption capacity and is close to the central region 41 that holds a large amount of excretory fluid. Ventilation channels are formed in the region where the heat is applied, and the feeling of stuffiness can be reduced.
  • regions 45 and 45 have the protrusion part adjacent high density part 12 adjacent to the center area
  • the density of all constituent materials such as fibers forming the absorbent core, absorbent polymer, etc. This means that the high basis weight portion 42 is relatively lower in density than the protruding portion adjacent high density portion 12.
  • a side region 45 having a lower basis weight and a lower density than the protruding portion adjacent high density portion 12 is further arranged on the outer side in the width direction than the protruding portion adjacent high density portion 12.
  • the protruding portion adjacent high density portion 12 is formed by the method shown in FIG. 4, the density on the non-skin facing surface side is higher than the density on the skin facing surface side. The entire thickness direction of the absorbent core is cut out and measured.
  • the density of the high density portion 12 adjacent to the protrusions is 110% or more, preferably 120% or more, and preferably 400%, with respect to the density of the high basis weight portion 42 without the vertical and horizontal grooves in the central region 41.
  • it is more preferably 300% or less, preferably 110% or more and 400% or less, and more preferably 120% or more and 300% or less.
  • the density of the protruding portion adjacent high density portion 12 is 150% or more, preferably 160% or more, and preferably 500% or less, more preferably 400% or less, with respect to the density of the side region 45.
  • it is preferably 150% or more and 500% or less, and more preferably 160% or more and 400% or less.
  • a test piece having a size of 3 mm in the product width direction and 30 mm in the product length direction is cut using a single-edged razor manufactured by Feather Co., Ltd. so as to have a predetermined area.
  • the test piece of the high basis weight part 42 without the vertical groove and the horizontal groove in the central region 41 is cut out, and the mass is measured using an electronic balance (an electronic balance GR-300 manufactured by A & D, accuracy: 4 digits after the decimal point). .
  • the cross section of the cut sample is observed at a magnification of 20 to 100 times using, for example, a microscope (VHX-1000 manufactured by KEYENCE), and the thickness is measured.
  • the number of test pieces to be measured is 5, and the average value is the thickness of the central region.
  • the measured mass was divided by the volume of the test piece (thickness ⁇ length in the product width direction ⁇ length in the product longitudinal direction) to calculate the density of the central region.
  • each cut-out test piece is cut out from five absorbent articles, the test piece to measure is made into the same location 5 pieces of the absorbent core 40, and let the average value be the thickness of a test piece.
  • the measured mass was divided by the volume of the test piece (thickness ⁇ length in the product width direction ⁇ length in the product longitudinal direction), and the density of the test piece cut out from each part was calculated.
  • the density ratio between the test piece cut out from the center side of the product and the test piece cut out from the outer side in the width direction adjacent to the test piece in order from the test piece cut out from the product center side (When the density ratio is 0.5 or less, the density of the test piece on the outer side in the product width direction is set as the density of the high density portion 12 adjacent to the protrusions. did.
  • the protrusion-adjacent high-density portion 12 includes a portion 42 ′ that becomes the high basis weight portion 42 in the central region 41 of the absorbent core 40 when the napkin is manufactured. It is formed by compressing both sides 12 'in the width direction formed in the same thickness. By having such a configuration in the central region 41, the following effects can be obtained.
  • the protrusion adjacent high-density part 12 has deformation resistance against deformation when pressure from the wearer is applied to the excretory part-facing part, the lateral region 45 of the absorbent core 40 protrudes from the center. It becomes easy to deform while maintaining a space between the portion 5 and the side region 45. For this reason, the effects of the present invention described above are more easily exhibited. This configuration is also advantageous for absorption performance.
  • body fluid is discharged to the central projecting portion 5 of the central region 41 at the excretory portion facing portion B. On the side of the central region 41, there are projection-adjacent high-density portions 12 formed by compressing the central protrusion 5.
  • the body fluid which has spread in the width direction Y and the thickness direction is guided to the high density portion. Since the protrusion-adjacent high-density portion 12 has a higher basis weight of the absorbent material than the side region 45, it has a high ability to retain body fluid. Therefore, the body fluid is dammed at both sides of the central region 41, and hardly reaches the both sides in the width direction of the napkin 1. For this reason, in the napkin 1, the side leakage of body fluid is easily suppressed.
  • the protrusion adjacent high density portion 12 will be described more specifically.
  • the protrusion-adjacent high-density portion 12 in the napkin 1 includes a portion 12 ′ that becomes the protrusion-adjacent high-density portion 12 as shown in FIG.
  • both sides of the central thick region 41 ′ of the absorbent core 40A are compressed and formed.
  • the constant thickness portion is compressed by compressing certain portions located on the left and right sides of the portion that becomes the central protrusion of the central thick region 41 ′, and the central protrusion 5 in which the portion is not compressed is compressed.
  • the protruding portion adjacent high density portion 12 As a region having a higher density than that, the protruding portion adjacent high density portion 12 is formed. Further, since the protrusion-adjacent high-density portion 12 has a sufficient absorption capacity because the basis weight of the absorbent material is higher than the other portions of the side region 45, the body fluid has the absorbent core 40. Suppresses reaching the side edge. Therefore, it becomes easy to prevent body fluid from leaking from the side of the napkin 1.
  • the protruding portion adjacent high density portion 12 has substantially the same thickness as the portion of the side region 45 where the vertical groove 50 and the horizontal groove 44 do not exist, but the present invention is not limited to this.
  • the density portion 12 is thinner than the central protrusion 5, but may be thicker than the side region 45.
  • the longitudinal groove 50 of the central projecting portion 5 has a width direction length of the bottom portion 50b narrower than the opening 50a. More specifically, as shown in FIGS. 2A and 2B, the longitudinal groove 50 of the central projecting portion 5 gradually decreases in length in the width direction from the opening 50a toward the bottom 50b.
  • the vertical groove 50 has a substantially inverted V shape from the non-skin facing surface side toward the skin facing surface side.
  • a stepped cross-sectional shape may be used, but when the pressure is applied from both sides in the width direction, the non-skin facing surface of the central region 41 is greatly deformed when it is substantially inverted V-shaped. Since the amount of deformation of the skin facing surface is small, a flexible sensation can be obtained without narrowing the absorption area at the excretory portion facing portion. This effect functions particularly effectively when the protruding portion adjacent high density portion 12 exists.
  • the longitudinal groove 50 of the central projecting portion 5 has a width direction length La of the opening 50a of preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 5 mm or less, more preferably.
  • the width direction length Lb of the bottom 50b is preferably 1 mm or less, and more preferably 0.5 mm or less.
  • the lower limit of the width direction length Lb of the bottom 50b is 0 (zero).
  • the depth of the vertical groove 50 is preferably 0.5 mm or greater and 5.0 mm or less, and more preferably 1.0 mm or greater and 3.0 mm or less.
  • the difference in length in the width direction between the opening 50a and the bottom 50b is preferably 0.5 mm or more and 3 mm or less, and more preferably 1 mm or more and 2 mm or less.
  • the longitudinal groove 50 preferably has a depth ratio [depth / difference (La ⁇ Lb)] to a difference in length in the width direction between the opening 50a and the bottom 50b (La ⁇ Lb). 5 or more and 20 or less, more preferably 1 or more and 10 or less. Within this range, the shape of the longitudinal groove during wearing is easily stabilized, and it becomes easy to maintain a preferable shape for taking in excreta.
  • the bottom 50b of the vertical groove 50 is located below the lower surface S2 of the side region 45.
  • the position of the lower surface S ⁇ b> 2 of the side region 45 here is the lower surface of the high basis weight portion 46 in the side region 45 adjacent to the central region 41.
  • the bottom portion 50 b of the vertical groove 50 is preferably located below the lower surface S ⁇ b> 2 of the side region 45 over the entire region of the central region 41 in the longitudinal direction X of the absorbent core 40.
  • the skin opposing surface is flat.
  • the central region 42 having the central protrusion 5 has a shallow depth, the bottom 44d reaches a position closer to the non-skin side surface than the lower surface S2 of the side region 45, and the central region
  • the lateral groove 44 extending from the side region 45 to the side region 45 is formed, and the lateral groove 44 is formed by reducing the basis weight of the material for forming the absorbent core.
  • it is highly deformable and is less likely to cause wrinkles on the skin facing surface of the napkin 1. Therefore, as shown in FIG.
  • the absorbent body 4 and the non-skin facing surface of the napkin 1 including the absorbent body 4 are aligned with the wearer's liquid excretion part or tear, and the overall shape is aligned with the wearer's body shape.
  • the absorbent core In addition to being excellent in the fit with respect to the unevenness of the body, it is excellent in follow-up deformability with respect to the movement of the wearer, and it is difficult to give a sense of incongruity due to wrinkles or breakage of the absorbent core.
  • Such an effect is further enhanced when the bottom 44 d of the lateral groove 44 is positioned below the lower surface S ⁇ b> 2 of the side region 45 over the entire region of the central region 41 in the width direction Y of the absorbent core 40.
  • the ratio of the depth of the lateral groove 44a (44) in the central region 41 to the thickness t1 of the central region 41 is preferably 50% or more.
  • it is 60% or more, preferably 95% or less, more preferably 90% or less, preferably 50% or more and 95% or less, and preferably 60% or more and 90% or less. Is more preferable.
  • the width W of the lateral groove 44 is preferably 0.2 mm or more, more preferably 0.5 mm or more, preferably 3 mm or less, more preferably 2 mm or less, and 0.2 mm or more and 3 mm or less. It is preferable that it is 0.5 mm or more and 2 mm or less.
  • the width W of the lateral groove 44 is a dimension in the longitudinal direction X of the absorbent core as shown in FIG.
  • the napkin 1 since the high basic weight part 42 of the center area
  • the density of the low basis weight part is preferably 5% or more, more preferably 10% or more, and preferably the ratio to the density of the adjacent high basis weight part. It is 50% or less, more preferably 40% or less, preferably 5% or more and 50% or less, more preferably 10% or more and 40% or less.
  • the side region 45 is also provided with side longitudinal grooves 52 extending in the longitudinal direction.
  • the opening 52 a located on the skin facing surface side and the bottom 52 b located on the non-skin facing surface side have substantially the same length in the width direction Y.
  • substantially the same means that the difference in width direction length between the opening and the bottom at the same position in the longitudinal direction is within 5%.
  • the opening 52a of the lateral longitudinal groove 52 is made wider than the bottom 52b, the opening is more greatly deformed by the compressive force that the napkin 1 receives from the lower part of the user's foot during wearing.
  • One side edge portion may be deformed so as to be rounded toward the user. Such deformation is caused by the napkin 1 side edge warping toward the user's skin side, so that the napkin 1 hits the buttocks strongly, or the user's skin and the surface of the napkin 1 are separated from each other at the center of the napkin 1. May occur.
  • the opening 52a and the bottom 52b have substantially the same length in the width direction, the risk of occurrence of such a problem can be reduced. Moreover, it is useful for the stability of the shape of the longitudinal groove 50 of the central region 41 in the present invention.
  • the lateral longitudinal groove 52 is adjacent to the protruding portion adjacent high density portion 12.
  • the absorbent core 40 in contact with the lateral side of the lateral longitudinal groove 52 and the absorbent core 40 in contact with the central side of the lateral longitudinal groove 52 are different in hardness. It becomes easy to bend the side edge part in the direction opposite to the user's skin with the longitudinal groove 52 as a basic axis, and by making the shape of the napkin 1 being worn more stable, the user feels uncomfortable feeling by wearing the napkin 1 In addition to the reduction, the central part of the napkin 1 is more closely attached to the user's skin, and the liquid can be absorbed more efficiently.
  • the liquid is prevented from exuding to the side of the high-density portion, and more The liquid is fixed in an area close to the center area of the napkin 1, and there is an effect that liquid leakage from the side edge of the napkin 1 is prevented.
  • the bottom surface 50a of the vertical groove 50 in the central region 41 is located on the non-skin facing surface side than the bottom surface 52a of the lateral vertical groove 52.
  • the above-described absorbent core 40 of the napkin 1 includes, for example, a stacking drum 54 that includes an accumulation recess 55 on the outer peripheral surface and rotates in one direction R, and a material for forming the absorbent core on the outer peripheral surface of the stacking drum 54. It is possible to manufacture the absorbent core 40A described above using the fiber stacking device 53 (see FIG. 6) provided with the duct 59 for supplying the powder in a scattered state, and then performing the processing as shown in FIG. it can.
  • FIG. 4 shows an absorbent core 40A having a central thick region 41 ′ at the center in the direction CD perpendicular to the transport direction MD, a press roll 61 having a recess 62 in a part of the peripheral surface, and the peripheral surface being smooth.
  • FIG. 4 shows a case where the portion that becomes the central region 41 forming the central protrusion 5 is not pressurized, but either one or both of the portion that becomes the central region 41 and the portion that becomes the side region 45. May be compressed and compressed more weakly than the portion 12 ′ that becomes the protruding portion adjacent high-density portion 12.
  • a plurality of stacking recesses 55 in the fiber stacking device 53 shown in FIG. 6 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the fiber stacking drum 54.
  • the bottom surface 56 of the accumulation recess 55 is made of a mesh plate or the like and has a large number of pores functioning as suction holes.
  • a recess 56a for forming the central thick region 41 ′ is formed on a part of the bottom surface 56 of the accumulation recess 55.
  • breathable members 57 and 58 for forming low basis weight portions such as the low basis weight portions 43 and 48.
  • the non-breathable members 57 and 58 are fixed so as to protrude from the bottom surface of the accumulation recess 55, and may be non-breathable members, for example, made of metal or plastic.
  • the material for forming the absorbent core is supplied into the duct while sucking from the bottom surface of the accumulation concave portion 55 in the same manner as in the known fiber pile device including the fiber pile drum.
  • the material for forming the absorbent core is deposited in a predetermined shape in the accumulation recess 55.
  • the absorbent core 40A is obtained by releasing the deposit 4 ′ from the accumulation recess 55.
  • the absorbent core 40A may be pressurized and appropriately compressed by passing between a pair of rolls before or after coating with the core wrap sheet.
  • the portion made of the core forming material deposited on the air-permeable members 57 and 58 becomes the low basis weight portion 43 and the like, and is deposited on the bottom surface without the air-permeable members 57 and 58.
  • the portion thus formed becomes the high basis weight portion 42 or the like.
  • a high basis weight portion 42 having a higher density than the low basis weight portion 43 is formed in the central region 41, thereby forming the central region 41.
  • the high basis weight portion 46 having a higher density than the low basis weight portion 47 is formed in the side region 45.
  • the press (compression) which forms the protrusion adjacent high-density part 12 in the central thick region 41 ′ of the absorbent core 40A can also be performed before or after coating with the core wrap sheet.
  • the pressing (compression) for forming the protruding portion adjacent high density portion 12 may be performed simultaneously with the pressing of the central region 41 or simultaneously with the pressing of the side region 45 using a roll having a step on the peripheral surface. good. Moreover, it is also possible to carry out simultaneously with the press of the center area
  • the surface sheet 2a and the non-skin side sheet 3 those similar to those conventionally used in the technical field can be used without particular limitation.
  • a liquid-permeable nonwoven fabric or a perforated film can be used as the top sheet 2a.
  • a water-repellent nonwoven fabric having a high water pressure resistance such as a liquid-impermeable film made of a synthetic resin or a spunbond-meltblown-spunbond laminated nonwoven fabric can be used.
  • a water-repellent nonwoven fabric having high water pressure resistance such as a spunbond-meltblown-spunbond laminated nonwoven fabric or the like can be used.
  • one or both of the lateral lateral grooves 44b and the lateral longitudinal grooves 52 may not be present in the lateral region 45.
  • One or both of the lateral lateral grooves 44b and the lateral longitudinal grooves 52 may be formed on the skin facing surface side of the absorbent core 40.
  • region 45 may be formed only in the excretion part opposing part of an absorbent article, and may be formed only in the back part.
  • the absorbent core may be composed only of a fiber material such as pulp fiber, or may include both a fiber material and a superabsorbent polymer.
  • a fiber material such as pulp fiber
  • various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation.
  • pulp fibers, rayon fibers, cotton Short fibers of cellulosic fibers such as fibers, short fibers of synthetic fibers such as polyethylene, and the like are used. These fibers can be used alone or in combination of two or more.
  • the fiber material is preferably entirely or partly pulp fiber, and the ratio of the pulp fiber in the fiber material is preferably 50 to 100% by mass, more preferably 80 to 100% by mass, More preferably, it is 100 mass%.
  • the absorbent core may contain a deodorant or an antibacterial agent as necessary.
  • the density of the high basis weight portion is higher than that of the low basis weight portion, but the density of both may be the same by omitting the pressing step of the absorbent core.
  • the absorbent article of the present invention may be other absorbent articles such as panty liners (origami sheets), incontinence pads, disposable diapers in addition to sanitary napkins.
  • panty liners origami sheets
  • incontinence pads disposable diapers in addition to sanitary napkins.
  • the description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be substituted.
  • the absorbent body including a vertically long absorbent core that is long in the front-rear direction of the absorbent article is provided between the skin-side sheet that forms the skin-facing surface and the non-skin-side sheet that forms the non-skin-facing surface.
  • the absorbent core in the excretory part-facing portion, has a side region located on both sides in the width direction and a side region located on the center side in the width direction relative to the side region.
  • a central region having a large thickness, the side region and the central region are integrally formed, the central region protrudes toward the non-skin-side sheet side, the absorber,
  • the absorbent article which has the non-joining area
  • ⁇ 2> The absorbent article according to ⁇ 1>, wherein a portion adjacent to the central region in the side region has a high-density portion having a higher density than the central region.
  • a vertical groove having a bottom portion on the skin facing surface side along the longitudinal direction of the absorbent core is formed on the non-skin facing surface side of the central region, and the vertical groove is the bottom portion rather than the opening portion.
  • the absorbent article according to ⁇ 1> or ⁇ 2> wherein the length in the width direction is narrow.
  • ⁇ 4> The absorbent article according to ⁇ 3>, wherein the longitudinal groove is gradually narrowed in the width direction as it goes from the opening to the bottom.
  • ⁇ 5> The absorbent article according to any one of ⁇ 1> to ⁇ 4>, wherein a central lateral groove extending in a width direction of the absorbent core is formed in the central region.
  • ⁇ 6> The absorbent article according to any one of ⁇ 1> to ⁇ 5>, wherein a lateral longitudinal groove extending in a longitudinal direction of the absorbent core is formed in the lateral region.
  • ⁇ 7> The absorbent article according to ⁇ 6>, wherein lateral lateral grooves extending in the width direction of the absorbent core are formed in the lateral region.
  • Either one or both of the vertical groove and the horizontal groove are formed by reducing the basis weight of the absorbent material of the absorbent core, and any one of the above ⁇ 3> to ⁇ 7> The absorbent article as described.
  • the absorbent core according to ⁇ 3> to ⁇ 8> wherein the non-skin facing surface has an uneven shape in both the central region and the side region, while the skin facing surface is flat.
  • the central region of the absorbent core includes a high basis weight portion having a high basis weight in comparison with the low basis weight portion forming the bottom of the longitudinal groove.
  • ⁇ 11> The absorbent article according to ⁇ 10>, wherein in the central region, the density of the absorbent member is higher in the high basis weight portion than in the low basis weight portion.
  • ⁇ 12> In the side region of the absorbent core, the high basis weight portion having a high basis weight in comparison with the low basis weight portion forming the bottom of the longitudinal groove is provided.
  • ⁇ 13> The absorbent article according to ⁇ 12>, wherein in the side region, the density of the absorbent member is higher in the high basis weight portion than in the low basis weight portion.
  • ⁇ 14> The absorbent article according to any one of ⁇ 1> to ⁇ 13>, wherein the width of the central protrusion is 20% to 80% of the total width of the absorbent core.
  • ⁇ 15> The absorbent article according to any one of ⁇ 1> to ⁇ 14>, wherein the thickness of the central region is 110% or more and 400% or less with respect to the thickness of the side region.
  • the basis weight of the low basis weight part is such that the ratio of the high basis weight part to the basis weight is 5% or more and 80% or less.
  • the lateral groove of the central region and the lateral groove of the lateral region have the same position in the longitudinal direction of the absorbent core at the boundary between the central region and the lateral region, ⁇ 7
  • ⁇ 18> The absorbent article according to any one of ⁇ 3> to ⁇ 17>, wherein a bottom of the longitudinal groove in the central region is located below a lower surface of the side region.
  • ⁇ 21> The ratio of the depth of the lateral groove in the central region to the total thickness of the absorbent core in the central region is 50% to 95%, and any one of the above items ⁇ 5> to ⁇ 20> Absorbent article as described in 1.
  • ⁇ 22> The above-described ⁇ 1> to ⁇ 21, wherein the central protruding portion has a ratio of a height protruding from the lower surface of the side region to a total thickness of the central region of 20% to 90% in the excretory portion facing portion. > The absorbent article as described in any one of>.
  • the absorbent article has a front part, an excretion part facing part, and a rear part in the longitudinal direction thereof, and the skin side sheet, the non-skin side sheet, and the absorbent core in the excretion part facing part.
  • ⁇ 25> The absorbent article according to any one of ⁇ 1> to ⁇ 24>, wherein the absorbent article has a pair of rear flap portions on both left and right sides of the absorbent main body in the rear portion.
  • ⁇ 26> The absorbent article according to any one of ⁇ 1> to ⁇ 25>, wherein the absorbent article is a sanitary napkin.
  • the absorbent article of the present invention is excellent in the fit when worn, and particularly in the fit when a high pressure is applied.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
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  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2015/079509 2014-10-30 2015-10-20 吸収性物品 WO2016067965A1 (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019209120A (ja) * 2018-06-05 2019-12-12 花王株式会社 吸収性物品
WO2019235427A1 (ja) * 2018-06-05 2019-12-12 花王株式会社 吸収性物品

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