WO2017209071A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2017209071A1
WO2017209071A1 PCT/JP2017/019966 JP2017019966W WO2017209071A1 WO 2017209071 A1 WO2017209071 A1 WO 2017209071A1 JP 2017019966 W JP2017019966 W JP 2017019966W WO 2017209071 A1 WO2017209071 A1 WO 2017209071A1
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WO
WIPO (PCT)
Prior art keywords
absorbent
absorbent core
absorbent article
groove
core
Prior art date
Application number
PCT/JP2017/019966
Other languages
English (en)
Japanese (ja)
Inventor
義徳 村上
暁 湯山
雅義 阿部
幸江 加藤
祐一 廣瀬
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 CN201780016546.8A priority Critical patent/CN108882999B/zh
Publication of WO2017209071A1 publication Critical patent/WO2017209071A1/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
    • 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
    • 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
    • A61F13/533—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 discontinuous areas of compression
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/40—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing ingredients of undetermined constitution or reaction products thereof, e.g. plant or animal extracts

Definitions

  • the present invention relates to an absorbent article.
  • Patent Document 1 discloses a technique related to a menstrual band containing an inorganic metal salt, and hemoglobin in menstrual blood is agglomerated by the metal inorganic salt and passes through a colorless fluid for absorption in other parts of the pad. It is said that.
  • Patent Document 2 discloses a sanitary napkin containing a blood gelling agent, and exemplifies a partially hydrated dicarboxylic anhydride copolymer or polycation as the blood gelling agent.
  • Patent Document 3 discloses a personal care absorbent article having a porous nonwoven web treated with a fluid treatment agent suitable for modifying red blood cells, and includes triblock containing polypropylene oxide and polyethylene oxide as fluid treatment agents. Examples are polymers or polycations.
  • Patent Document 4 an absorbent article having an absorbent core in which a plurality of transverse grooves extending in the width direction is formed. Since the transverse groove which the absorptive core of patent documents 4 has is formed by reducing the basis weight of the material for forming the absorptive core, there is a sense of incongruity due to wrinkles or breakage of the absorptive core when the absorbent article is worn. It is hard to give, and a feeling of wear becomes good.
  • the present invention has a longitudinal direction corresponding to the longitudinal direction of the wearer and a lateral direction perpendicular to the longitudinal direction, and has an absorbent core having a long shape in the longitudinal direction, and is disposed opposite to the liquid excretion part of the wearer. It is an absorbent article which has the excretion part opposing part.
  • the absorbent article includes a hemagglutinating agent.
  • the said absorptive core has a thin recessed part which is not joined to the said surface sheet in the said excretion part opposing part.
  • the hemagglutinating agent is disposed in the excretion part facing part of the absorbent core or the excretion part facing part of the constituent member of the absorbent article located on the skin facing surface side of the absorbent core.
  • FIG. 1 is a perspective view of a sanitary napkin which is a preferred embodiment of the absorbent article of the present invention.
  • FIG. 2 is a sectional view schematically showing a section taken along line II-II in FIG.
  • FIG. 3 is a partially broken perspective view showing an absorbent core and a core wrap sheet constituting the absorbent body of the sanitary napkin shown in FIG.
  • FIG. 4 is a plan view showing an absorbent core included in the sanitary napkin shown in FIG. 2.
  • FIG. 5 is a cross-sectional view schematically showing a cross section taken along line VV of FIG. 6 (a) and 6 (b) are schematic views showing a cross-section along the circumferential direction of the fiber drum preferably used for manufacturing the absorbent core of the sanitary napkin shown in FIG.
  • FIG. 6A shows a state before the absorbent core forming material is deposited in the accumulation recess
  • FIG. 6B shows a state in which the absorbent core formation material is deposited in the accumulation recess
  • FIG. 7 is a cross-sectional view of an absorbent body showing a blood clot formed by the hemagglutinating agent contained in the core wrap sheet shown in FIG. 5 when the napkin shown in FIG. 1 is used.
  • FIG. 8: is a top view which shows the absorptive core with which the sanitary napkin of other embodiment of the absorbent article of this invention is provided.
  • FIG. 9 is a plan view showing an absorbent core included in a sanitary napkin according to still another embodiment of the absorbent article of the present invention.
  • red blood cell components can be aggregated, but the absorption means for the colorless fluid component that has been filtered and passed is not sufficiently taken into consideration, and is continuously discharged. Aggregates formed at an early stage of menstrual blood obstruct later menstrual blood absorption. In addition, there is a problem that the formed aggregate of red blood cell components gives wet back (liquid return) due to a load from the body at the time of wearing, and gives the wearer a sticky discomfort.
  • Patent Document 2 and Patent Document 3 describe that a fluid treatment agent containing a polycation can be used, only data on a nonionic treatment agent is actually disclosed.
  • Patent Document 4 does not describe anything about using a hemagglutinating agent. Therefore, Patent Document 4 does not naturally describe or suggest the positional relationship between the absorbent core and the hemagglutinating agent.
  • the present invention relates to an absorbent article that can eliminate the disadvantages of the above-described conventional technology.
  • the absorbent article of the present invention will be described with reference to the drawings based on a sanitary napkin 1 (hereinafter also referred to as “napkin 1”) which is a preferred embodiment thereof.
  • the napkin 1 includes an absorbent core 41 having a shape that is long in the front-rear direction, and has an excretion part facing part B that is disposed to face a liquid excretion part (such as a vaginal opening) of the wearer.
  • the napkin 1 includes a hemagglutinating agent 8.
  • FIG. 1 shows a perspective view of a napkin 1 which is a preferred embodiment of the absorbent article of the present invention
  • FIG. 2 shows a cross-sectional view of the napkin 1.
  • the absorbent article of the present invention is preferable for menstrual blood absorption.
  • the napkin 1 includes a liquid-permeable surface sheet 2 that forms a skin facing surface, a back sheet 3 that forms a non-skin facing surface, and both of these sheets 2.
  • 3 has an absorbent main body 10 including an absorbent body 4 provided with an absorbent core 41.
  • the absorbent body 4 has an absorbent core 41 containing a superabsorbent polymer and a core wrap sheet 42 that covers the skin facing surface and the non-skin facing surface of the absorbent core 41.
  • the absorbent main body 10 of the napkin 1 is a wearer than the excretion part facing part B, which is disposed opposite to the excretion part (vagina mouth or the like) of the wearer when worn, and the wearer facing part B.
  • the front part A which is arranged closer to the abdomen (front side) and the rear part C which is arranged closer to the wearer's back side (rear side) than the excretory part facing part B, It has a long shape.
  • the napkin 1 and the absorbent main body 10 have a longitudinal direction X corresponding to the wearer's front-rear direction, a lateral direction Y orthogonal to the longitudinal direction X, and a thickness direction Z. That is, the absorptive main body 10 is divided in the order of the front part A, the excretion part opposing part B, and the rear part C in the longitudinal direction X which is the front-back direction.
  • a skin opposing surface is a surface in the napkin 1 or its component (for example, surface sheet 2) orient
  • a non-skin opposing surface is a napkin. 1 or a component thereof, which is a surface directed to the side opposite to the skin side (clothing side) when the napkin 1 is worn.
  • the longitudinal direction X coincides with the longitudinal direction of the napkin 1 and the absorbent main body 10
  • the lateral direction Y coincides with the width direction (direction orthogonal to the longitudinal direction) of the napkin 1 and the absorbent main body 10.
  • the napkin 1 is further laterally extended from both side portions along the longitudinal direction X of the excretory part-facing portion B of the absorbent main body 10 in addition to the absorbent main body 10. It has a pair of wing parts 10W and 10W extending outward of Y.
  • the excretory part facing part B is a region having one wing 10W in the longitudinal direction X (one wing) when having the wing part 10W like the napkin 1 of the present embodiment.
  • two folding lines crossing the absorbent article in the lateral direction Y ( (Not shown) means a region surrounded by a first folding line and a second folding line as counted from the front end in the longitudinal direction X of the absorbent article.
  • the top sheet 2 covers the entire skin facing surface of the absorbent body 4 as shown in FIG.
  • the back sheet 3 covers the entire area of the non-skin facing surface of the absorbent body 4 and further extends outward in the lateral direction Y from both side edges along the longitudinal direction X of the absorbent body 4 to be described later.
  • a side flap portion 10 ⁇ / b> S is formed together with the forming sheet 7.
  • the leak-proof cuff forming sheet 7 and the back sheet 3 fixed to the skin-facing surface of the top sheet 2 are adhesives, heat seals, ultrasonic waves at the extended portions from both ends in the longitudinal direction X of the absorber 4. They are joined together by a known joining means such as a seal.
  • between each of the top sheet 2 and the back sheet 3 and the absorbent body 4 may be joined by an adhesive.
  • the leak-proof cuff forming sheet 7 includes both side portions along the longitudinal direction X on the skin facing surface of the surface sheet 2 disposed on the skin facing surface of the absorbent main body 10 as shown in FIGS. 1 and 2. It is arranged and fixed. Preferably, the leak-proof cuff forming sheet 7 is arranged and fixed over the entire length in the longitudinal direction X of the absorbent main body 10 so as to overlap both left and right side portions along the longitudinal direction X of the absorbent body 4 in plan view. ing.
  • each of the pair of leak-proof cuff forming sheets 7 and 7 has a folded portion 71 that is folded outward in the lateral direction Y, as shown in FIGS. 1 and 2, respectively. 71 is joined onto the topsheet 2 at a joint 72 located slightly outward in the lateral direction Y.
  • the leak-proof cuff forming sheet 7 has a leak-proof cuff forming elastic member 74 in the vicinity of the free end portion 73 that forms the free end of the leak-proof cuff, and when worn, the leak-proof cuff forming elastic member 74.
  • the leak-proof cuff has an upright property and can prevent side leakage of menstrual blood excreted on the skin-facing surface.
  • the side flap part 10S protrudes greatly outward in the lateral direction Y at the excretory part facing part B, and thereby the left and right along the longitudinal direction X of the absorbent main body 10 A pair of wing portions 10W and 10W are extended on both sides.
  • the wing part 10W is used by being folded back to the non-skin facing surface side of the crotch part of clothes such as shorts.
  • the wing portion 10 ⁇ / b> W has a substantially trapezoidal shape in which a lower base (a side longer than the upper base) is located on a side portion along the longitudinal direction X of the absorbent main body 10 in a plan view, as shown in FIG. 1. It has a shape.
  • a wing part adhesive part for fixing the wing part 10W (napkin 1) to clothes (not shown) such as shorts is formed, and this wing part adhesive part is used.
  • the wing portion 10W folded back to the non-skin facing surface (outer surface) side of the crotch portion of the clothes can be adhesively fixed to the crotch portion.
  • the main body adhesion part (not shown) for fixing the absorptive main body 10 to clothes, such as shorts, is also formed in the non-skin opposing surface of the absorptive main body 10.
  • the napkin 1 is integrated with the skin facing surface (skin facing surface of the top sheet 2) of the absorbent main body 10, and the top sheet 2 and the absorber 4 are integrated toward the back sheet 3 side.
  • a linear squeezing groove 9 is provided. “Linear” in the linear compressed groove 9 means that the shape of the groove (concave portion) is not limited to a straight line in a plan view but includes a curved line. Each line may be a continuous line or a discontinuous line such as a broken line.
  • the squeezing groove 9 may be composed of a row formed by a number of discontinuous point embosses.
  • the compressed groove 9 configured in this way is a groove different from a groove portion 43 described later formed only in the absorbent core 41 of the absorbent body 4.
  • the pressing groove 9 can be formed by performing the embossing accompanying pressurization or a heating and pressurization.
  • the pressing groove 9 may be in a state where its constituent fibers are heat-sealed. In any case, the density of the compressed groove 9 is higher than the density of other parts excluding the compressed groove 9.
  • the pressing grooves 9 are formed in the front portion A and the rear portion C, respectively, in the horizontal pressing groove 91 extending in the horizontal direction Y, and on both sides along the vertical direction X. It has a vertical squeezing groove 92 extending in the longitudinal direction X from the front part A to the rear part C.
  • the lateral squeezing grooves 91 of the front part A and the rear part C extend in the lateral direction Y while forming a convex curved shape outward in the longitudinal direction X.
  • the lateral pressing groove 91 of the front part A, one vertical pressing groove 92, the horizontal pressing groove 91 of the rear part C, and the other vertical pressing groove 92 are connected to form a ring-shaped circumferential groove.
  • the compressed groove 9 formed in this way can effectively prevent liquid leakage from the periphery of the napkin 1 by suppressing diffusion of body fluid flowing in the plane direction on the top sheet 2.
  • the absorbent core 41 is formed from a fiber assembly made of a fiber material containing pulp fibers, and in the napkin 1, the fiber assembly is formed by holding a superabsorbent polymer.
  • the absorptive core 41 of the napkin 1 contains the pulp fiber and the superabsorbent polymer.
  • the absorbent core 41 is covered with a core wrap sheet 42 on both the skin facing surface and the non-skin facing surface.
  • a single core wrap sheet 42 is used in the napkin 1, as shown in FIG. 2, a single core wrap sheet 42 is used.
  • One core wrap sheet 42 has a length that is at least twice as long as the length of the absorbent core 41 in the lateral direction Y.
  • the core wrap sheet 42 is used for the purpose of preventing leakage of the forming material of the absorbent core 41 and improving the shape retention of the absorbent core 41.
  • top sheet 2 and the core wrap sheet 42 covering the skin facing surface side of the absorbent core 41 are preferably joined to each other by a pattern-coated adhesive such as dots, spirals, stripes or the like.
  • a particulate polymer As the superabsorbent polymer that the absorbent core 41 has, a particulate polymer is generally used, but a fibrous polymer may be used.
  • the shape thereof may be any of a spherical shape, a block shape, a bowl shape, and an amorphous shape.
  • a polymer or copolymer of acrylic acid or alkali metal acrylate can be used as the superabsorbent polymer. Examples thereof include polyacrylic acid and salts thereof and polymethacrylic acid and salts thereof.
  • sodium salts can be preferably used.
  • the absorbent core 41 has a shape that is long in the same direction as the longitudinal direction X of the napkin 1. Therefore, the longitudinal direction X of the absorbent core 41 is the same as the longitudinal direction X of the absorbent main body 10 of the napkin 1, and the lateral direction Y of the absorbent core 41 is the lateral direction Y of the absorbent main body 10 of the napkin 1. Is in the same direction.
  • the absorptive core 41 has the thin recessed part 43 in the excretion part opposing part B.
  • the “thin concave portion 43” means that the bottom has a thickness even though it is thin in the thickness direction Z, and penetrates the absorbent core 41 without any constituent material of the absorbent core. It is a site that includes both cases and is thinner than other sites. However, it is preferable that the “thin recess 43” has a bottomed portion made of the constituent material of the absorbent core.
  • the concave portion 43 of the napkin 1 is a groove portion (hereinafter also referred to as the groove portion 43) extending in a groove shape.
  • the “groove portion” means a portion of the concave portion 43 that extends in the surface direction composed of the vertical direction X and the horizontal direction Y with a length of 5 times or more the width (groove width) of the concave portion 43. .
  • the absorptive core 41 has the part which the recessed part 43 has not joined to the surface sheet in the excretion part opposing part B.
  • FIG. By the said structure, in the excretion part opposing part B, it has a site
  • FIG. in the napkin 1 of this embodiment, although the recessed part 43 is joined with the surface sheet 2 in the part in which the pressing groove 9 exists in the absorptive core 41, such joining is performed in the other recessed part 43. Not. In this invention, it is not necessary that the recessed part 43 and the surface sheet are not joined in the excretion part opposing part B whole region, and it should just be such a structure in part.
  • the concave portion 43 present in the excretory part facing part B and the topsheet 2 are not joined at 30% or more, particularly 50% or more of the total area of the concave part 43 present in the excretory part facing part B.
  • the recessed part 43 in the absorptive core 41 is the surface. It is preferable that not only the sheet 2 but also the core wrap sheet 42 is not joined. With this configuration, the formed erythrocyte aggregate is more difficult to return to the wearer's skin.
  • the absorbent core 41 includes a block 43 having a relatively low basis weight and a plurality of small absorbent portions 44 having a relatively high basis weight and surrounded by the groove 43.
  • the structure has at least block regions BT arranged in the vertical direction X in the excretory part facing part B.
  • the groove 43 has a lateral groove 43 ⁇ / b> Y extending in the lateral direction Y of the absorbent core 41 and a longitudinal groove 43 ⁇ / b> X extending in the longitudinal direction X of the absorbent core 41.
  • the recessed part 43 of the absorptive core 41 is open to the skin facing surface side in the present embodiment, and in the napkin 1, the groove 43 is open to the skin facing surface side.
  • the bottom 43 of the groove 43 of the napkin 1 is arranged on the non-skin facing surface side in the thickness direction Z of the absorbent core 41.
  • the absorptive core 41 has the middle-high part 45 thicker than the peripheral area
  • the middle-high part 45 is formed thicker than the thickness in the peripheral region 46 excluding the middle-high part 45 in the absorbent core 41, and the napkin 1 is raised toward the skin side of the wearer.
  • the middle-high part 45 of the napkin 1 has the excretion part middle-high part 45B formed in the center part of the horizontal direction Y in the excretion part opposing part B, and the back middle high part 45C in the center part of the horizontal direction Y in the back part C. Yes.
  • the excretory part middle-high part 45B bulges outward in the lateral direction Y from the middle middle-high part 45BC having a vertically long shape in the longitudinal direction X of the absorbent core 41 and both side edges along the longitudinal direction X of the middle middle-high part 45BC. It has side middle and high parts 45BS, 45BS.
  • a night napkin when the napkin 1 is a night napkin, it is preferable because leakage from the rear can be prevented by the rear raised portion 10C.
  • a night napkin having a total length of 30 cm or more preferably has the rear raised portion 10C.
  • the excretory part middle high part 45 ⁇ / b> B having the middle middle high part 45 ⁇ / b> BC and the pair of side middle high parts 45 ⁇ / b> BS, 45 ⁇ / b> BS is thicker than the thickness in the peripheral region 46 of the absorbent core 41. It is formed in the excretion part opposing part B.
  • the excretion part middle high part 45B may be formed only in the excretion part opposing part B, in the napkin 1, as shown in FIG.1 and FIG.4, it extends over a part of the back part C from the excretion part opposing part B. It is extended.
  • the pair of side middle high portions 45BS, 45BS are formed in the excretory portion facing portion B, and the middle middle high portion 45BC extends from the excretory portion facing portion B to a part of the rear portion C. is doing.
  • the absorbent core 41 including the middle-high portion 45 having the excretory portion middle-high portion 45 ⁇ / b> B and the rear middle-high portion 45 ⁇ / b> C and the peripheral region 46 has a lateral groove portion extending in the lateral direction of the absorbent core 41.
  • the absorbent core 41 is formed with a plurality of small absorbent portions 44 arranged along the longitudinal direction X of the absorbent core 41.
  • the absorbent core 41 including the middle and high portions 45 is divided by the longitudinal groove portions 43 ⁇ / b> X extending in the longitudinal direction X of the absorbent core 41, whereby the absorbent core 41 includes the absorbent core 41.
  • the absorbent core 41 of the napkin 1 has a block region BT in which a plurality of block structures each having a plurality of small absorbent portions 44 surrounded by the lateral groove portions 43Y and the vertical groove portions 43X are arranged in the vertical direction X. It is formed not only from the part B but from the front part A to the rear part C.
  • the thickness of the excretory part middle high part 45B having the center middle high part 45BC and the pair of side middle high parts 45BS, 45BS protrudes toward the skin on the skin-facing surface of the napkin 1.
  • the excretion part raised part 10B preferably 120% or more of the thickness of the peripheral region 46 of the absorbent core 41, More preferably, it is 150% or more, preferably 500% or less, more preferably 400% or less, and preferably 120% or more and 500% or less, more preferably 150% or more and 400% or less.
  • the difference in thickness (the former-the latter) between the thickness of the excretion part middle high part 45B and the thickness of the peripheral region 46 of the absorbent core 41 is preferably 1 mm or more, more preferably 1.5 mm or more. Is 8 mm or less, more preferably 6 mm or less, and preferably 1 mm or more and 8 mm or less, more preferably 1.5 mm or more and 6 mm or less. Further, the thickness of the central middle high portion 45BC and the thickness of the side middle high portion 45BS may be the same or different as long as the thickness is within the above range.
  • the thickness of the peripheral region 46 of the absorbent core 41 means that when the concave portion 43 such as the groove 43 extending in the surface direction of the absorbent core 41 is formed in the peripheral region 46, such a concave portion 43 exists. It is the thickness in the part which does not.
  • the thickness of the excretion part middle high part 45B is such that when the concave part 43 such as the groove part 43 extending in the surface direction of the absorbent core 41 is formed in the excretion part middle high part 45B, such a concave part 43 exists. It is the thickness in the part which does not.
  • the excretion part middle high part 45B of the absorptive core 41 preferably has a thickness in the groove part 43 of 70% or less of the thickness of the part other than the groove part 43 (same as the thickness of the small absorption part 44 of the excretion part middle high part 45B), More preferably, it is 50% or less, preferably 20% or more, more preferably 30% or more, and preferably 20% or more and 70% or less, more preferably 30% or more and 50% or less.
  • erythrocyte aggregates are easily captured and follow the movement of the wearer, so that the erythrocyte aggregates are less likely to migrate to the skin side while the napkin 1 is worn.
  • the thickness of each part of the absorbent core 41 is measured from a photograph of the cut end surface of the absorbent article under no load.
  • the thickness of the rear middle high portion 45 ⁇ / b> C is formed on the skin-facing surface of the napkin 1 by forming a rear raised portion 10 ⁇ / b> C (see FIG. 1) that protrudes toward the skin.
  • the difference in thickness between the thickness of the rear middle high portion 45C and the thickness of the peripheral region 46 of the absorbent core 41 is preferably 0.5 mm or more, more preferably 1.0 mm or more, Preferably they are 5.0 mm or less, More preferably, it is 4.0 mm or less, Preferably they are 0.5 mm or more and 5.0 mm or less, More preferably, they are 1.0 mm or more and 4.0 mm or less.
  • the thickness of the rear middle high portion 45C is a portion where such a concave portion 43 does not exist when the concave portion 43 such as a groove 43 extending in the surface direction of the absorbent core 41 is formed in the rear middle high portion 45C.
  • the rear middle high portion 45C of the absorbent core 41 preferably has a thickness in the groove portion 43 of 70% or less, more preferably the thickness of the portion other than the groove portion 43 (same as the thickness of the small absorbent portion 44 of the rear middle high portion 45C). Is 50% or less, preferably 10% or more, more preferably 20% or more, and preferably 10% or more and 70% or less, more preferably 20% or more and 50% or less.
  • the thickness of each part of the absorbent core 41 is measured from a photograph of the cut end surface of the absorbent article under no load.
  • the peripheral region 46 that is an annular region that collectively surrounds the excretory portion middle and high portions 45 ⁇ / b> B and 45 ⁇ / b> C has a thickness in the groove portion 43.
  • the thickness of the portion other than 43 is 70% or less, more preferably 50% or less, and preferably 5% or more, more preferably 10% or more. Also, it is preferably 5% or more and 70% or less, more preferably 10% or more and 50% or less.
  • the thickness of the groove portion 43 in the peripheral region 46 and the thickness of the portion other than the groove portion 43 is within the above range, red blood cell aggregates are easily captured and the movement of the wearer is easily followed. Aggregates are less likely to move to the skin side while the napkin 1 is being worn. Further, when the lower limit value of the thickness of the groove 43 is 20% or more of the portion other than the groove 43, the separated plasma component moves to the non-skin facing surface side of the absorbent core 41, and then the groove 43. Since the absorbent core portion located on the non-skin facing surface side from the bottom of the skin can be diffused, it is preferable because the absorption performance is excellent and the plasma component can be further suppressed from returning to the skin side.
  • the thickness of each part of the absorbent core 41 is measured from a photograph of the cut end surface of the absorbent article under no load.
  • the excretion part middle high part 45 ⁇ / b> B and the rear middle high part 45 ⁇ / b> C are each formed of a material for forming the absorbent core 41 (hereinafter “core material”) rather than the peripheral region 46 of the absorbent core 41. It is formed by increasing the basis weight. That is, the small absorbent portion 44 of the excretion portion middle high portion 45B and the small absorbent portion 44 of the rear middle high portion 45C each have a basis weight of the core material higher than a basis weight of the small absorbent portion 44 in the peripheral region 46 of the absorbent core 41. Is also big.
  • the absorbent core 41 in this embodiment has a difference in the basis weight of the core material to provide a thickness difference, it is different from the case where a thickness difference is provided by compressing a part of the absorbent core having a uniform basis weight.
  • the absorbent core 41 is also flexible as a whole in the peripheral region 46.
  • the groove 43 having the lateral groove 43 ⁇ / b> Y and the vertical groove 43 ⁇ / b> X is made of the core material from the excretion part middle high part 45 ⁇ / b> B, the rear middle high part 45 ⁇ / b> C and other parts in the peripheral region 46. Reduced and formed. That is, the groove portion 43 has the lowest basis weight of the core material. Further, unlike the case where a groove portion formed by compressing a part of a portion having a uniform basis weight is provided, the density of the core material in the groove portion 43 is lower than the density in the small absorption portion 44.
  • the small absorbent portion 44 of the middle-high portion 45 has a basis weight of preferably 250 g / m 2 or more, more preferably 300 g / m 2 or more, and preferably 1000 g / m 2 or less, more preferably 800 g / m 2. In addition, it is preferably 250 g / m 2 or more and 1000 g / m 2 or less, more preferably 300 g / m 2 or more and 800 g / m 2 or less.
  • the basis weight of the small absorbent portion 44 in the peripheral region 46 is preferably 100 g / m 2 or more, more preferably 150 g / m 2 or more, and preferably 700 g / m 2 or less, more preferably 600 g / m 2 or less. Moreover, it is preferably 100 g / m 2 or more and 700 g / m 2 or less, more preferably 150 g / m 2 or more and 600 g / m 2 or less. Moreover, it is preferable that the basic weight of the small absorption part 44 of the middle-high part 45 is larger than the basic weight of the small absorption part of the peripheral region 46.
  • each of the horizontal groove portion 43Y and the vertical groove portion 43X is preferably 10 g / m 2 or more, more preferably 20 g / m 2 or more, and preferably 500 g / m 2 or less, more preferably 400 g / m 2 or less. Moreover, it is preferably 10 g / m 2 or more and 500 g / m 2 or less, more preferably 20 g / m 2 or more and 400 g / m 2 or less.
  • the basis weight of the core material in the groove portion 43 is cut by cutting the boundary between the groove portion 43 and other portions, and the mass of the narrow sample is divided by the area of the surface of the sample facing the skin, for example.
  • the basis weight of the portion other than the groove portion 43 is obtained by dividing the mass of the sample obtained by cutting out the portion other than the groove portion 43 by the area of the surface of the sample on the skin facing surface side, for example.
  • the entire absorbent core 41 having the middle-high portion 45, the peripheral region 46, and the groove 43 is integrally formed.
  • “Integrally molded” means that the same material is used to form parts in one process, unlike the case where members manufactured in different processes are joined by means of bonding, such as adhesives or compression. Means that
  • the absorbent core 41 of the napkin 1 described above has a stacking recess 55 on the outer peripheral surface and rotates in one direction R, and the outer periphery of the stacking drum 54 It can be manufactured using a fiber stacking device provided with a duct (not shown) for supplying the core material in a scattered state on the surface.
  • a plurality of stacking recesses 55 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the 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.
  • two concave portions 56b and 56c for forming the excretory portion middle high portion 45B and the rear middle high portion 45C are formed on a part of the bottom surface 56 of the accumulation concave portion 55.
  • a breathable member 57 for forming the groove portion 43 in the excretion portion middle high portion 45B is disposed at the bottom portion of the concave portion 56b, and the groove portion 43 is formed in the rear middle high portion 45C also at the bottom portion of the concave portion 56c.
  • a breathable member 57 is disposed.
  • a non-breathable member 58 for forming the groove 43 is formed on the bottom surface 56 of the accumulation recess 55 other than the recesses 56b and 56c.
  • 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, plastic, ceramic, or the like.
  • the core material such as pulp fiber into the duct while sucking from the bottom surface of the accumulation concave portion 55, as in a known fiber pile device including a fiber pile drum.
  • the core material is deposited in a predetermined shape in the accumulation recess 55.
  • the absorbent core 41 is obtained by releasing the deposit 40 from the accumulation recess 55.
  • the absorbent core 41 is pressed and appropriately compressed by passing between a pair of rolls before or after coating with the core wrap sheet 42.
  • the portion made of the core material deposited on the air-permeable member 57 becomes the groove portion 43 having a relatively small basis weight and density, and is deposited on the bottom surface of the concave portions 56b and 56c that does not have the air-permeable member 57.
  • the portion made of the core material deposited on the air-permeable member 58 becomes the groove portion 43 having a relatively small basis weight and density, and does not have the air-permeable member 58.
  • a portion deposited on the bottom surface becomes a peripheral region 46 having a small absorption portion 44 having a relatively large basis weight and density.
  • the superabsorbent polymer constituting the core material of the absorbent core 41 is contained in the fiber assembly by providing a superabsorbent polymer introduction part in the middle of the duct.
  • the hemagglutinating agent 8 is disposed on the excretory part facing part B of the absorbent core 41 or the excretory part facing part B of the constituent member of the napkin 1 located on the skin facing surface side of the absorbent core 41. Then, it is distribute
  • FIG. As a structural member located on the skin-facing surface side of the absorbent core 41 in the napkin 1, the surface sheet 2 or the core wrap sheet 42 may be mentioned. In this embodiment, as shown in FIG.
  • the agent 8 is disposed on the core wrap sheet 42.
  • the hemagglutination agent 8 may be distribute
  • the second sheet is a sheet called a sub-layer sheet in the technical field that is separate from the top sheet 2 and the absorber 4.
  • the sub-layer sheet is a sheet that plays a role of improving the liquid permeability from the top sheet 2 to the absorber 4 or reducing the return of the liquid absorbed by the absorber 4 to the top sheet 2. is there.
  • the hemagglutinating agent 8 provided in the napkin 1 acts to agglutinate erythrocytes in blood to form aggregates and separate them from plasma components.
  • a preferred hemagglutinating agent has the property that when 1000 ppm of a measurement sample agent is added to simulated blood, at least two erythrocytes aggregate to form an agglomerate while maintaining blood fluidity. It is.
  • “the state in which the fluidity of blood is maintained” means that 10 g of the simulated blood to which the measurement sample agent is added is a screw tube bottle (product number “Screw tube No.
  • erythrocytes aggregate to form an aggregate is determined as follows. That is, the simulated blood to which 1000 ppm of the measurement sample agent was added was diluted 4000 times with physiological saline, and a laser diffraction / scattering type particle size distribution measuring device (manufactured by HORIBA, Inc., model number: LA-950V2, measurement condition: flow type cell measurement).
  • a laser diffraction / scattering type particle size distribution measuring device manufactured by HORIBA, Inc., model number: LA-950V2, measurement condition: flow type cell measurement.
  • a cationic polymer is suitable.
  • the cationic polymer include cationized cellulose and cationized starch such as hydroxypropyltrimonium chloride.
  • the hemagglutinating agent 8 can also contain a quaternary ammonium salt homopolymer, a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate as a cationic polymer.
  • the “quaternary ammonium salt” includes a compound having a plus monovalent charge at the nitrogen atom position, or a compound that generates a plus monovalent charge at the nitrogen atom position by neutralization.
  • the “copolymer” is a polymer obtained by copolymerization of two or more kinds of polymerizable monomers, and is a binary copolymer or a ternary copolymer or more. Includes both things.
  • the “polycondensate” is a polycondensate obtained by polymerizing a condensate composed of two or more monomers.
  • the hemagglutinating agent 8 includes a quaternary ammonium salt homopolymer and / or a quaternary ammonium salt copolymer and / or a quaternary ammonium salt polycondensate as the cationic polymer
  • the hemagglutinating agent 8 is , Quaternary ammonium salt homopolymer, quaternary ammonium salt copolymer and quaternary ammonium salt polycondensate may be included, or any combination of two or more may be included. You may go out.
  • a quaternary ammonium salt homopolymer can be used individually by 1 type or in combination of 2 or more types.
  • the quaternary ammonium salt copolymer can be used alone or in combination of two or more.
  • a quaternary ammonium salt polycondensate can be used individually by 1 type or in combination of 2 or more types.
  • the “hemagglutinating agent” means that a single compound capable of aggregating blood erythrocytes, a plurality of combinations of the single compounds, or a combination of a plurality of compounds expresses erythrocyte aggregation. It is an agent to do.
  • the hemagglutinating agent is an agent limited to those having a hemagglutination effect. Therefore, when the hemagglutinating agent contains the third component, it is expressed as a hemagglutinating agent composition and is distinguished from the hemagglutinating agent.
  • the term “single compound” is a concept including compounds having the same composition formula but having different molecular weights due to different numbers of repeating units.
  • quaternary ammonium salt polymer a quaternary ammonium salt copolymer or a quaternary ammonium salt polycondensate
  • quaternary ammonium salt polymer a quaternary ammonium salt polymer that is quaternary ammonium salt of a quaternary ammonium salt in a quaternary ammonium salt in a quaternary ammonium salt in a quaternary ammonium salt polycondensate.
  • the quaternary ammonium salt homopolymer is obtained by polymerizing one type of polymerizable monomer having a quaternary ammonium moiety.
  • the quaternary ammonium salt copolymer uses at least one polymerizable monomer having a quaternary ammonium moiety and, if necessary, at least one polymerizable monomer having no quaternary ammonium moiety. It was obtained by using seeds and copolymerizing them. That is, the quaternary ammonium salt copolymer is obtained by using two or more polymerizable monomers having a quaternary ammonium moiety and copolymerizing them, or having a quaternary ammonium moiety.
  • the quaternary ammonium salt copolymer may be a random copolymer, an alternating copolymer, a block copolymer, or a graft copolymer.
  • the quaternary ammonium salt polycondensate is obtained by polymerizing these condensates using a condensate composed of one or more monomers having a quaternary ammonium moiety.
  • the quaternary ammonium salt polycondensate is obtained by polymerizing two or more condensates having two or more monomers having a quaternary ammonium moiety, or the quaternary ammonium moiety. And a condensate comprising one or more monomers having quaternary ammonium moieties and one or more monomers having no quaternary ammonium moiety, and obtained by condensation polymerization.
  • the quaternary ammonium salt polymer is a cationic polymer having a quaternary ammonium moiety.
  • a quaternary ammonium moiety can be generated by quaternary ammoniumation of a tertiary amine using an alkylating agent.
  • the tertiary amine can be dissolved in acid or water and generated by neutralization. Or it can produce
  • the alkylating agent include alkyl halides and dialkyl sulfates such as dimethyl sulfate and dimethyl sulfate.
  • dialkyl sulfate is preferable because the problem of corrosion that may occur when an alkyl halide is used does not occur.
  • the acid include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, citric acid, phosphoric acid, fluorosulfonic acid, boric acid, chromic acid, lactic acid, oxalic acid, tartaric acid, gluconic acid, formic acid, ascorbic acid, and hyaluronic acid. .
  • a quaternary ammonium salt polymer in which a tertiary amine moiety is quaternized with an alkylating agent, because the electric double layer of erythrocytes can be reliably neutralized.
  • Quaternary ammoniumation by a nucleophilic reaction including a condensation reaction can be caused by a ring-opening polycondensation reaction of dimethylamine and epichlorohydrin or a cyclization reaction of dicyandiamide and diethylenetriamine.
  • Red blood cells have a red blood cell membrane on their surface.
  • the erythrocyte membrane has a two-layer structure. This two-layer structure is composed of a red blood cell membrane skeleton as a lower layer and a lipid membrane as an upper layer.
  • the lipid film exposed on the surface of erythrocytes contains a protein called glycophorin.
  • Glycophorin has a sugar chain to which a sugar having an anionic charge called sialic acid is bonded at its end.
  • erythrocytes can be treated as colloidal particles having an anionic charge.
  • an aggregating agent is used for aggregating the colloidal particles.
  • erythrocytes are anionic colloidal particles, it is advantageous to use a cationic substance as an aggregating agent from the viewpoint of neutralizing the electric double layer of erythrocytes.
  • the aggregating agent has a polymer chain, the polymer chains of the aggregating agent adsorbed on the surface of the erythrocyte tend to be entangled with each other, thereby promoting the aggregation of erythrocytes.
  • the aggregating agent has a functional group, it is preferable because the aggregation of erythrocytes is promoted by the interaction between the functional groups.
  • the cationic polymer preferably has a molecular weight of 2000 or more, more preferably 10,000 or more, and even more preferably 150,000 or more.
  • the upper limit of the molecular weight is preferably 30 million or less, more preferably 22 million or less, and even more preferably 10 million or less.
  • the molecular weight of the cationic polymer is preferably 2000 or more and 30 million or less, more preferably 10,000 or more and 22 million or less, and particularly preferably 150,000 or more and 10 million or less.
  • the molecular weight referred to in the present invention is a weight average molecular weight.
  • the molecular weight of the cationic polymer can be controlled by appropriately selecting the polymerization conditions.
  • the molecular weight of the cationic polymer can be measured using HLC-8320GPC manufactured by Tosoh Corporation. Specific measurement conditions are as follows.
  • a column a column in which a guard column ⁇ and an analytical column ⁇ -M manufactured by Tosoh Corporation are connected in series is used at a column temperature of 40 ° C.
  • the detector uses RI (refractive index).
  • 1 mg of the treatment agent (quaternary ammonium salt polymer) to be measured is dissolved in 1 mL of the eluent.
  • a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate uses an eluent in which 150 mmol / L sodium sulfate and 1% by mass acetic acid are dissolved in water.
  • a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate has a molecular weight of 5900, a pullulan with a molecular weight of 47300, a pullulan with a molecular weight of 212,000, and a molecular weight of 788,000 with respect to 10 mL of the eluent. Pullulan, a pullulan mixture with 2.5 mg each dissolved, is used as the molecular weight standard.
  • a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate is measured at a flow rate of 1.0 mL / min and an injection amount of 100 ⁇ L.
  • Polyethylene oxide (PEO) having a molecular weight of 50,000, PEO having a molecular weight of 235,000, PEO having a molecular weight of 875,000, and a PEG-PEO mixture in which 10 mg of each is dissolved is used as a molecular weight standard. Except for a copolymer containing a water-soluble polymerizable monomer such as hydroxyethyl methacrylate, the flow rate is 0.6 mL / min and the injection amount is 100 ⁇ L.
  • the quaternary ammonium salt polymer has a flow potential of 1500 ⁇ eq / L or more from the viewpoint of more effectively generating red blood cell aggregates. , More preferably 2000 ⁇ eq / L or more, still more preferably 3000 ⁇ eq / L or more, still more preferably 4000 ⁇ eq / L or more.
  • the flow potential of the quaternary ammonium salt polymer is not less than these values, the electric double layer of erythrocytes can be sufficiently neutralized.
  • the upper limit of the streaming potential is preferably 13000 ⁇ eq / L or less, more preferably 8000 ⁇ eq / L or less, and even more preferably 6000 ⁇ eq / L or less.
  • the streaming potential of the quaternary ammonium salt polymer is preferably 1500 ⁇ eq / L or more and 13000 ⁇ eq / L, more preferably 2000 ⁇ eq / L or more and 13000 ⁇ eq / L or less, and 3000 ⁇ eq / L or more and 8000 ⁇ eq / L or less. Is more preferably 4000 ⁇ eq / L or more and 6000 ⁇ eq / L or less.
  • the flow potential of the quaternary ammonium salt polymer adjusts, for example, the molecular weight of the constituting cationic monomer itself, and the copolymerization molar ratio of the cationic monomer and the anionic monomer or nonionic monomer constituting the copolymer. Can be controlled.
  • the streaming potential of the quaternary ammonium salt polymer can be measured using a streaming potential measuring device (PCD04) manufactured by Spectris Co., Ltd. Specific measurement conditions are as follows. First, hot melt bonding each member to a commercially available napkin is invalidated using a dryer or the like, and decomposed into members such as a top sheet, an absorber, and a back sheet.
  • a multi-stage solvent extraction method from a nonpolar solvent to a polar solvent is performed to separate the treating agent used in each member to obtain a solution containing a single composition.
  • the obtained solution was dried and solidified, and 1H-NMR (nuclear magnetic resonance method), IR (infrared spectroscopy), LC (liquid chromatography), GC (gas chromatography), MS (mass spectrometry), GPC (gel) Permeation chromatography) and fluorescent X-rays are combined to identify the structure of the treatment agent.
  • the cationic polymer In order for the cationic polymer to be successfully adsorbed on the surface of red blood cells, it is advantageous that the cationic polymer easily interacts with sialic acid present on the surface of red blood cells. From this point of view, the present inventors proceeded with studies, and as a result, inorganic value / organic value (hereinafter referred to as “IOB (Inorganic Organic Balance) value”), which is the ratio between the inorganic value and the organic value of the substance. It was found that the degree of interaction between the sialic acid conjugate and the cationic polymer can be evaluated on the basis of. Specifically, it has been found advantageous to use a cationic polymer having an IOB value that is the same as or close to that of the sialic acid conjugate.
  • the sialic acid conjugate is a compound in which sialic acid can exist in a living body, and examples thereof include a compound in which sialic acid is bound to the end of a glycolipid such as galactolipid.
  • the properties of a substance are largely controlled by various intermolecular forces between molecules, and this intermolecular force mainly consists of Van Der Wals force due to molecular mass and electric affinity due to the polarity of the molecule. If the Van Der Waals force, which has a great influence on changes in the properties of substances, and the electrical affinity can be grasped individually, the properties of unknown substances or their mixtures can be predicted from the combination. be able to.
  • This idea is a theory well known as “organic conceptual diagram”.
  • Conceptual diagram of organic materials is, for example, “Organic analysis” written by Kei Fujita (Kanya Shoten, Showa 5), “Organic qualitative analysis: Systematic.
  • the degree of physical properties due to Van Der Waals force is called ⁇ organic ''
  • the degree of physical properties mainly due to electrical affinity is called ⁇ inorganic ''
  • the physical properties of substances are considered as a combination of “organic” and “inorganic”.
  • one carbon (C) is defined as organic 20
  • the inorganic and organic values of various polar groups are defined as shown in Table 1 below. The sum of the values is obtained, and the ratio between the two is defined as the IOB value.
  • the IOB value of the sialic acid conjugate described above is determined based on these organic and inorganic values
  • the IOB value of the cationic polymer is determined based on the value.
  • the inorganic value and the organic value are determined based on the repeating unit of the homopolymer, and the IOB value is calculated.
  • the IOB value is calculated according to the following procedure according to the molar ratio of the monomers used for the copolymerization. That is, a copolymer is obtained from monomer A and monomer B, the organic value of monomer A is ORA, the inorganic value is INA, the organic value of monomer B is ORB, and the inorganic value is INB. Yes, when the molar ratio of monomer A / monomer B is MA / MB, the IOB value of the copolymer is calculated from the following equation.
  • the IOB value of the cationic polymer thus determined is preferably 0.6 or more, more preferably 1.8 or more, further preferably 2.1 or more, 2.2 It is still more preferable that it is above. Further, the IOB value of the cationic polymer is preferably 4.6 or less, more preferably 3.6 or less, and even more preferably 3.0 or less. Specifically, the IOB value of the cationic polymer is preferably 0.6 or more and 4.6 or less, more preferably 1.8 or more and 3.6 or less, and 2.1 or more and 3.6 or less. More preferably, it is 2.2 or more and 3.0 or less.
  • the IOB value of sialic acid is 4.25 for sialic acid alone and 3.89 for sialic acid conjugate.
  • the sialic acid conjugate is a glycolipid in which a sugar chain in a glycolipid and sialic acid are bound, and the sialic acid conjugate has a higher organic value ratio and a lower IOB value than sialic acid alone.
  • the organic value itself is preferably 40 or more, more preferably 100 or more, and even more preferably 130 or more. Further, it is preferably 310 or less, more preferably 250 or less, still more preferably 240 or less, and even more preferably 190 or less.
  • the organic value is preferably 40 or more and 310 or less, more preferably 40 or more and 250 or less, still more preferably 100 or more and 240 or less, and still more preferably 130 or more and 190 or less.
  • the inorganic value of the cationic polymer is preferably 70 or more, more preferably 90 or more, still more preferably 100 or more, still more preferably 120 or more, and 250 or more. It is particularly preferred that Further, it is preferably 790 or less, more preferably 750 or less, still more preferably 700 or less, still more preferably 680 or less, and particularly preferably 490 or less.
  • the inorganic value is preferably from 70 to 790, more preferably from 90 to 750, even more preferably from 90 to 680, still more preferably from 120 to 680, It is especially preferable that it is 250 or more and 490 or less.
  • x and y satisfy the following formula A when the organic value of the cationic polymer is x and the inorganic value is y.
  • y ax (A)
  • a is preferably 0.66 or more, more preferably 0.93 or more, and even more preferably 1.96 or more.
  • a is preferably 4.56 or less, more preferably 4.19 or less, and even more preferably 3.5 or less.
  • a is preferably a number from 0.66 to 4.56, more preferably from 0.93 to 4.19, and a number from 1.96 to 3.5. Is more preferable.
  • the organic value and the inorganic value of the cationic polymer satisfy the above formula A, provided that the organic value and the inorganic value of the cationic polymer are within the above-mentioned ranges, the cation The functional polymer is likely to interact with the sialic acid conjugate, and the cationic polymer is more easily adsorbed to erythrocytes.
  • the cationic polymer is preferably water-soluble.
  • water-soluble means that 0.05 g of a 1 mm or less powdery or 0.5 mm or less film-like cationic polymer is added to a 100 mL glass beaker (5 mm ⁇ ) and mixed with 50 mL ion-exchanged water at 25 ° C.
  • a stirrer chip having a length of 20 mm and a width of 7 mm is inserted, and the whole amount is dissolved in water within 24 hours under stirring at 600 rpm using a magnetic stirrer HPS-100 manufactured by ASONE Co., Ltd.
  • the total amount is preferably dissolved in water within 3 hours, and the total amount is more preferably dissolved in water within 30 minutes.
  • the cationic polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto.
  • the quaternary ammonium salt polymer preferably has a structure having a main chain and a plurality of side chains bonded thereto.
  • the quaternary ammonium moiety is preferably present in the side chain.
  • the main chain and the side chain are bonded at one point, the flexibility of the side chain is difficult to be hindered, and the quaternary ammonium moiety present in the side chain is smoothly formed on the surface of the erythrocyte. Adsorbs.
  • bonded at one point means that one of the carbon atoms constituting the main chain is single-bonded with one carbon atom located at the end of the side chain.
  • Connected at two or more points means that two or more of the carbon atoms constituting the main chain are each single-bonded with two or more carbon atoms located at the end of the side chain.
  • a quaternary ammonium salt polymer has a structure having a main chain and a plurality of side chains bonded thereto.
  • the number of carbon atoms in each side chain is preferably 4 or more, more preferably 5 or more, and even more preferably 6 or more.
  • the upper limit of the carbon number is preferably 10 or less, more preferably 9 or less, and even more preferably 8 or less.
  • the number of carbon atoms in the side chain is preferably 4 or more and 10 or less, more preferably 5 or more and 9 or less, and still more preferably 6 or more and 8 or less.
  • the carbon number of the side chain is the carbon number of the quaternary ammonium moiety (cation moiety) in the side chain, and even if carbon is contained in the anion that is the counter ion, the carbon is counted. Not included.
  • the number of carbon atoms from the carbon atom bonded to the main chain to the carbon atom bonded to the quaternary nitrogen is in the above range, so that the quaternary ammonium salt. This is preferable because the steric hindrance when the polymer is adsorbed on the surface of the erythrocyte is reduced.
  • the quaternary ammonium salt polymer is a quaternary ammonium salt homopolymer
  • examples of the homopolymer include a polymer of a vinyl monomer having a quaternary ammonium moiety or a tertiary amine moiety.
  • a quaternary ammonium salt homopolymer in which the tertiary amine moiety is quaternized with an alkylating agent before and / or after polymerization are examples of the homopolymer.
  • alkylating agent and the acid are as described above.
  • the quaternary ammonium salt homopolymer preferably has a repeating unit represented by the following formula 1.
  • quaternary ammonium salt homopolymer examples include polyethyleneimine.
  • examples of the homopolymer in which the side chain having a quaternary ammonium moiety is bonded to the main chain at two or more points include polydiallyldimethylammonium chloride and polydiallylamine hydrochloride.
  • the quaternary ammonium salt polymer is a quaternary ammonium salt copolymer
  • two kinds of polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above are used as the copolymer.
  • a copolymer obtained by the above copolymerization can be used.
  • the quaternary ammonium salt copolymer one or more polymerizable monomers used for the polymerization of the quaternary ammonium salt homopolymer described above and a polymerizable monomer having no quaternary ammonium moiety
  • the copolymer obtained by copolymerizing using 1 or more types of bodies can be used.
  • the quaternary ammonium salt copolymer may be a binary copolymer or a ternary or higher copolymer.
  • the quaternary ammonium salt copolymer has a repeating unit represented by the above-described formula 1 and a repeating unit represented by the following formula 2 to effectively produce an agglomerate of erythrocytes. It is preferable from the viewpoint.
  • a cationic polymerizable monomer an anionic polymerizable monomer, or a nonionic polymerizable monomer can be used.
  • a cationic polymerizable monomer an anionic polymerizable monomer, or a nonionic polymerizable monomer
  • charge cancellation with a quaternary ammonium moiety in a quaternary ammonium salt copolymer is achieved. Therefore, erythrocyte aggregation can be effectively generated.
  • Examples of cationic polymerizable monomers include linear compounds having a cation-carrying nitrogen atom in the main chain, such as vinylpyridine as a cyclic compound having a cation-carrying nitrogen atom under a particular condition And a condensed compound of dicyandiamide and diethylenetriamine.
  • Examples of the anionic polymerizable monomer include 2-acrylamido-2-methylpropane sulfonic acid, methacrylic acid, acrylic acid, styrene sulfonic acid, and salts of these compounds.
  • nonionic polymerizable monomers examples include vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, hydroxyethyl methacrylate, hydroxyethyl acrylate, methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl Examples include acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, and butyl acrylate.
  • One of these cationic polymerizable monomers, anionic polymerizable monomers, or nonionic polymerizable monomers can be used, or any two or more of them can be used in combination. Can do.
  • a quaternary ammonium salt copolymer copolymerized using a cationic polymerizable monomer, an anionic polymerizable monomer and / or a nonionic polymerizable monomer as a polymerizable monomer has a molecular weight of However, as described above, it is preferably 10 million or less, particularly preferably 5 million or less, and particularly preferably 3 million or less (the same applies to the quaternary ammonium salt copolymer exemplified below).
  • a polymerizable monomer having a functional group capable of hydrogen bonding can also be used as the polymerizable monomer having no quaternary ammonium moiety.
  • a polymerizable monomer having a functional group capable of hydrogen bonding include —OH, —NH 2 , —CHO, —COOH, —HF, —SH and the like.
  • polymerizable monomers having functional groups capable of hydrogen bonding examples include hydroxyethyl methacrylate, vinyl alcohol, acrylamide, dimethylacrylamide, ethylene glycol monomethacrylate, ethylene glycol monoacrylate, hydroxyethyl methacrylate, hydroxyethyl An acrylate etc. are mentioned.
  • hydroxyethyl methacrylate, 2-hydroxyethyl methacrylate, hydroxyethyl acrylate, dimethylacrylamide, and the like in which hydrogen bonds work strongly, are preferable because the adsorption state of quaternary ammonium salt polymers on erythrocytes is stabilized.
  • These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.
  • a polymerizable monomer having a functional group capable of hydrophobic interaction can also be used.
  • a polymerizable monomer for copolymerization By using such a polymerizable monomer for copolymerization, the same advantageous effect as that in the case of using the polymerizable monomer having a functional group capable of hydrogen bonding described above, that is, the hardness of erythrocytes The effect that it becomes easy to produce an agglomerate is produced.
  • functional groups capable of hydrophobic interaction include alkyl groups such as methyl, ethyl, and butyl groups, phenyl groups, alkylnaphthalene groups, and fluorinated alkyl groups.
  • polymerizable monomers having functional groups capable of hydrophobic interaction examples include methyl methacrylate, methyl acrylate, ethyl methacrylate, ethyl acrylate, propyl methacrylate, propyl acrylate, butyl methacrylate, butyl acrylate, styrene, etc. Is mentioned.
  • methyl methacrylate, methyl acrylate, butyl methacrylate, butyl acrylate, etc. which have a strong hydrophobic interaction and do not significantly reduce the solubility of the quaternary ammonium salt polymer, are adsorbed to erythrocytes by the quaternary ammonium salt polymer. Is preferable because of stabilization.
  • These polymerizable monomers can be used individually by 1 type or in combination of 2 or more types.
  • the molar ratio of the polymerizable monomer having a quaternary ammonium moiety and the polymerizable monomer having no quaternary ammonium moiety in the quaternary ammonium salt copolymer is the quaternary ammonium salt. It is preferable that the red blood cells are appropriately adjusted so as to be sufficiently aggregated by the ammonium salt copolymer. Or it is preferable to adjust so that the streaming potential of a quaternary ammonium salt copolymer may become the value mentioned above. Or it is preferable to adjust so that IOB of a quaternary ammonium salt copolymer may become the value mentioned above.
  • the molar ratio of the polymerizable monomer having a quaternary ammonium moiety in the quaternary ammonium salt copolymer is preferably 10 mol% or more, more preferably 22 mol% or more, and 32 mol. % Or more, more preferably 38 mol% or more. Further, it is preferably 100 mol% or less, more preferably 80 mol% or less, still more preferably 65 mol% or less, and even more preferably 56 mol% or less.
  • the molar ratio of the polymerizable monomer having a quaternary ammonium moiety is preferably 10 mol% or more and 100 mol% or less, more preferably 22 mol% or more and 80 mol% or less, More preferably, it is 32 mol% or more and 65 mol% or less, and more preferably 38 mol% or more and 56 mol% or less.
  • the quaternary ammonium salt polymer is a quaternary ammonium salt polycondensate
  • a condensate composed of one or more monomers having the quaternary ammonium moiety described above is used as the polycondensate.
  • Polycondensates obtained by polymerizing these condensates can be used. Specific examples include dicyandiamide / diethylenetriamine polycondensate, dimethylamine / epichlorohydrin polycondensate, and the like.
  • the above-described quaternary ammonium salt homopolymer and quaternary ammonium salt copolymer can be obtained by a homopolymerization method or copolymerization method of a vinyl polymerizable monomer.
  • the polymerization method for example, radical polymerization, living radical polymerization, living cation polymerization, living anion polymerization, coordination polymerization, ring-opening polymerization, polycondensation and the like can be used.
  • radical polymerization, living radical polymerization, living cation polymerization, living anion polymerization, coordination polymerization, ring-opening polymerization, polycondensation and the like can be used.
  • the conditions under which a quaternary ammonium salt polymer having the desired molecular weight, streaming potential, and / or IOB value can be obtained may be appropriately selected.
  • the cationic polymer described in detail above is an example of the above-mentioned “preferable hemagglutinating agent 8”, and the effect thereof is Japanese Patent Application No. 2015-239286 and Japanese Patent Application Laid-Open No. 2016-107100 which is the Japanese publication of the application. And Examples 1 to 45 described in International Publication No. 2016/093233 pamphlet of the international application based on the priority claim.
  • the hemagglutinating agent 8 included in the napkin 1 is a composition containing a third component, for example, a solvent, a plasticizer, a fragrance, a skin care agent, etc. in addition to the polycation (cationic polymer) ( It may be given in the form of a hemagglutinating agent composition).
  • a third component for example, a solvent, a plasticizer, a fragrance, a skin care agent, etc.
  • a third component for example, a solvent, a plasticizer, a fragrance, a skin care agent, etc.
  • components other than the cationic polymer that can be included in the hemagglutinating agent 8 can be used singly or in combination.
  • the solvent water, a water-soluble organic solvent such as a saturated aliphatic monohydric alcohol having 1 to 4 carbon atoms, or a mixed solvent of the water-soluble organic solvent and water can be used.
  • glycerin polyethylene glycol, propylene glycol, ethylene glycol, 1,3-butanediol and the like can be used.
  • flavor the fragrance
  • the skin care agent plant extracts, collagen, natural moisturizing ingredients, moisturizing agents, keratin softening agents, anti-inflammatory agents and the like described in Japanese Patent No. 4084278 can be used.
  • the proportion of the cationic polymer in the hemagglutinating agent composition is preferably 1% by mass or more, more preferably 3% by mass or more, and further preferably 5% by mass or more. Further, it is preferably 50% by mass or less, more preferably 30% by mass or less, and still more preferably 10% by mass or less.
  • the proportion of the cationic polymer is preferably 1% by mass to 50% by mass, more preferably 3% by mass to 30% by mass, and even more preferably 5% by mass to 10% by mass. preferable.
  • the hemagglutinating agent 8 is disposed on the core wrap sheet 42 located on the skin facing surface side with respect to the absorbent core 41.
  • a raw material of the core wrap sheet 42 paper or a hydrophilic nonwoven fabric is preferably used.
  • the paper include paper made by a wet papermaking method mainly composed of wood pulp fibers, such as tissue paper.
  • the hydrophilic nonwoven fabric include air-through nonwoven fabric, point bond nonwoven fabric, spunlace nonwoven fabric, spunbond nonwoven fabric, and spunbond-meltblown-spunbond (SMS) nonwoven fabric.
  • the basis weight of the nonwoven fabric is preferably 10 to 100 g / m 2 , more preferably 15 to 60 g / m 2 .
  • the hemagglutinating agent 8 may be disposed on the excretory part facing part B of the core wrap sheet 42, but in the napkin 1, it is disposed on the entire surface of the core wrap sheet 42. Therefore, each of the skin facing surface and the non-skin facing surface of the absorbent core 41 is covered with a core wrap sheet 42 in which the hemagglutinating agent 8 is disposed on the entire surface.
  • the amount of hemagglutinating agent 8 contained in the core wrap sheet 42 is preferably 1 g / m 2 or more, more preferably 3 g / m 2 or more, and even more preferably 5 g / m 2 or more. . Further, it is preferably 20 g / m 2 or less, more preferably 15 g / m 2 or less, and still more preferably 10 g / m 2 or less.
  • the amount of hemagglutinating agent 8 in the core wrap sheet 42 is preferably 1 g / m 2 or more and 20 g / m 2 or less, more preferably 3 g / m 2 or more and 15 g / m 2 or less, and more preferably 5 g / m. it is more preferably 2 or more 10 g / m 2 or less.
  • the hemagglutinating agent 8 is a cationic polymer and the amount of the cationic polymer contained in the core wrap sheet 42 is in the above range.
  • hemagglutinating agent 8 is disposed on the core wrap sheet 42 can be easily analyzed by those skilled in the art, such as a method of extracting the constituent material by exposing it to a solvent and analyzing the components. It can also be judged as follows. Using an energy dispersive X-ray analyzer (EDX) attached to a scanning electron microscope (SEM), elemental analysis of each of the fibers and the hemagglutinating agent 8 constituting the core wrap sheet 42 is performed in advance. Next, a sample piece to be judged as to whether or not the hemagglutinating agent 8 is arranged is attached to an aluminum sample table using a double-sided carbon tape, and after performing platinum / vanadium coating as necessary, SEM observation is performed. The presence or absence of elements in the hemagglutinating agent 8 is confirmed using EDX (element analysis device) while enlarging. The measurement is performed at an acceleration voltage of 15 kV to 40 kV.
  • EDX energy dispersive X-
  • each structural member of the napkin 1 of this embodiment mentioned above is demonstrated.
  • the top sheet 2 and the back sheet 3 various kinds of materials conventionally used for absorbent articles such as sanitary napkins can be used without particular limitation.
  • the back sheet 3 a moisture-permeable resin film or the like can be used.
  • the surface sheet 2 a single layer or multilayer nonwoven fabric, a perforated film, or the like can be used.
  • the top sheet 2 can be coated with various oil agents for improving liquid permeability, for example, various surfactants.
  • the topsheet 2 has a multilayer structure, the topsheet 2 includes a first fiber layer located on the side close to the wearer's skin and a second fiber layer located on the side far from the wearer's skin. And both fiber layers are integrated in the thickness direction by a number of joints formed in part, and a portion of the first fiber layer located between the joints is convex. It is possible to use a concavo-convex sheet that protrudes and forms the concavo-convex convex portion.
  • the convex portion of the concavo-convex sheet may have a solid structure that is entirely filled with fibers, or may have a hollow structure having a space inside.
  • the concavo-convex sheet in which the convex portion has a solid structure for example, those described in Japanese Patent Application Laid-Open Nos. 2007-182626 and 2002-187228 can be used.
  • the surface sheet 2 may be embossed.
  • embossing pattern there is no restriction
  • a so-called round emboss having a closed shape along the periphery can be formed at a position inside the periphery of the absorbent body 4.
  • a portion corresponding to the side edge of the absorbent body 4 has a shape that bulges outward in the width direction of the absorbent body 4.
  • This round embossing may be composed of an assembly of discontinuous embossing patterns within a range that can be regarded as continuous when viewed as a whole.
  • an adhesive is applied and fixed between the top sheet 2 and the absorber 4 and between the absorber 4 and the back sheet 3.
  • the adhesive can be applied using a known means such as a slot coat gun, a spiral spray gun, a spray gun, or a dot gun.
  • the adhesive can be applied in a spiral shape using a spiral spray gun.
  • a hot melt adhesive is preferably used as the adhesive to be applied.
  • the application amount of the hot melt adhesive is preferably 1.5 g / m 2 or more and 10 g / m 2 or less.
  • the hemagglutinating agent 8 is opposed to the excretion part of the core wrap sheet 42 located on the skin facing surface side of the absorbent core 41 having the recess 43 (the groove part 43 in the present embodiment).
  • Part B is arranged. Therefore, during use of the napkin 1, menstrual blood is separated into red blood cells and plasma by the hemagglutinating agent 8 contained in the core wrap sheet 42, and the separated plasma is absorbed by the superabsorbent polymer of the absorbent core 41. Is done. Therefore, the amount of absorption of the absorber into the superabsorbent polymer can be increased, and the absorption rate for absorbing blood is increased.
  • a part of the aggregate 8 ⁇ / b> S formed by agglutinating two or more red blood cells by the hemagglutinating agent 8 is easily captured in the groove 43 of the absorbent core 41.
  • the recess 43 is not joined to the topsheet 2, so that wetback hardly occurs and the viscous agglomerate 8S is formed on the skin. It is difficult to touch, it is difficult to give discomfort to the wearer, and the wear feeling is improved.
  • the agglomerate 8S captured in the concave portion 43 is less likely to move toward the skin contact surface side, and wetback is more unlikely to occur.
  • the groove part 43 of the absorptive core 41 is opened to the skin opposing surface side as shown in FIG. Therefore, the agglomerate 8S is more easily captured in the groove 43 of the absorbent core 41, and the sticky agglomerate 8S is more difficult to touch the skin, and the feeling of wearing is further improved. Furthermore, since the agglomerates 8S formed in the absorbent core 41 and the groove 43 have an effect of blocking body fluid, it is difficult to generate a wetback, and the wearing feeling is improved.
  • the groove part 43 of the absorptive core 41 is extended in the groove
  • the agglomerate 8S is more easily captured in the groove 43 located in the excretory part-facing portion B of the absorbent core 41, and the sticky agglomerate 8S is more difficult to touch the skin, and the wearing feeling is further improved.
  • the agglomerate 8S has an effect of blocking body fluid that is not sufficiently absorbed, liquid return of the body fluid hardly occurs and the wet back property is excellent.
  • the absorbent core 41 has the middle-high part 45 in the center part of the horizontal direction Y in the excretion part opposing part B, and the middle-high part 45 is formed thicker than the thickness in the peripheral region 46.
  • the middle-high part 45 Since it has such a middle-high part 45, at the time of wear of an absorbent article, a fitting property improves and the sense of security with respect to a leak improves.
  • the groove part 43 is formed also in the middle-high part 45, it is easy to bend
  • the ratio of the total area of the recesses 43 to the area of the excretion part-facing part B of the recesses 43 of the absorbent core 41 is such that the aggregate 8S is easily trapped in the recesses 43 and wetback is unlikely to occur.
  • the area of the concave portion 43 relative to the area of the excretory part opposing part B in the excretory part opposing part B of the absorbent core 41 is viewed in plan.
  • the total ratio is preferably 10% or more, more preferably 15% or more, and preferably 50% or less, more preferably 30% or less. Specifically, It is preferably 10% or more and 50% or less, and more preferably 15% or more and 30% or less.
  • the area of the excretory part facing part B means an area having an average length of 50 mm in the vertical direction X and a length of 40 mm in the horizontal direction Y.
  • the depth of the recess 43 of the absorbent core 41 is such that the agglomerate 8S is easily captured in the recess 43, wetback is unlikely to occur, and the sticky agglomerate 8S is difficult to touch the skin.
  • the depth from the skin facing surface of the absorbent core 41 is preferably 0.3 mm or more, more preferably 0.4 mm or more, and It is preferably 5 mm or less, more preferably 4 mm or less, specifically, preferably 0.3 mm or more and 5 mm or less, and more preferably 0.4 mm or more and 4 mm or less.
  • the aggregate 8S is easily trapped in the concave portion 43, wetback occurs, or the thick aggregate 8S is formed on the skin. Further, it becomes difficult to touch, and the napkin 1 is easy to bend starting from the groove 43 in the recess 43, so that the wearer does not feel uncomfortable and the feeling of wear becomes good.
  • the recessed part of the absorptive core 41 is opened to the skin facing surface side, it becomes even better. The same applies to the case where the excretion part middle-high part 45B is provided in the excretion part facing part B as in the case of the napkin 1.
  • the recessed part of the absorptive core 41 has an opening in the skin opposing surface side, it replaces with this and is a form which has an opening in the non-skin opposing surface side of the absorptive core 41. There may be. This is because even in such a form, there is a holding space called the recess 43 after menstrual blood comes into contact with the hemagglutinating agent, so that the aggregate can be held there.
  • the hemagglutinating agent 8 is disposed on the entire surface of the constituent member (the core wrap sheet 42 in the present embodiment) of the napkin 1 located on the skin facing surface side of the absorbent core 41. From the viewpoint of further achieving the above effects.
  • the hemagglutinating agent 8 is arranged at a position overlapping the concave portion 43 of the absorbent core 41 in the constituent member of the napkin 1 (core wrap sheet 42 in the present embodiment) located on the skin facing surface side of the absorbent core 41. It is preferable that it is disposed only at a position overlapping with the recess 43.
  • the absorbent article of this invention is not restrict
  • the hemagglutinating agent 8 is disposed on the core wrap sheet 42 located on the skin-facing surface side with respect to the absorbent core 41. May be arranged in the excretion part facing part B.
  • the hemagglutinating agent 8 is preferably disposed in the concave part 43 in the excretion part opposing part B of the absorbent core 41.
  • the hemagglutinating agent 8 is disposed on the entire surface of one core wrap sheet 42, and the skin of the absorbent core 41 is formed by the one core wrap sheet 42 on which the hemagglutinating agent 8 is disposed on the entire surface. Both the opposing surface and the non-skin facing surface are covered, but the core wrap sheet 42 disposed on the skin facing surface side of the absorbent core 41 and the core wrap disposed on the non-skin facing surface side of the absorbent core 41
  • the absorbent core 41 may be covered with two core wrap sheets 42 made of the sheet 42.
  • the hemagglutinating agent 8 is preferably disposed only on the core wrap sheet 42 disposed on the skin facing surface side of the absorbent core 41.
  • the absorptive core 41 of the napkin 1 is provided with the middle-high part 45 which has the excretion part middle high part 45B and the back middle high part 45C, as shown in FIG.3 and FIG.4, and is enclosed by the horizontal groove part 43Y and the vertical groove part 43X.
  • the block region BT having a plurality of small absorbing portions 44 is formed from the front portion A to the rear portion C, as shown in FIG. 8, the horizontal groove portion 43Y and the vertical groove portion 43X do not have the middle-high portion 45.
  • a block region BT having a plurality of small absorbing portions 44 surrounded by a circle may be formed from the front portion A to the rear portion C.
  • the form provided with only the excretion part middle high part 45B may be sufficient as the absorbent article of this invention, without providing the back middle high part 45C.
  • the absorbent article of this invention is good also as a form provided with only the vertical groove part 43X in the excretion part middle high part 45B, or a form provided only with the horizontal groove part 43Y in the excretion part middle high part 45B.
  • the excretion part middle high part 45B may have a shape that does not include a portion that bulges in the lateral direction Y.
  • the absorbent article is formed by forming the block region BT from the front portion A to the rear portion C. At the time of wearing, it is easy to bend from the groove part 43, it is hard to give a sense of incongruity, and a feeling of wearing becomes favorable.
  • the absorptive core 41 of the napkin 1, as shown in FIGS. 3 and 4 is a middle-high part 45 having an excretory part middle-high part 45B having a central middle-high part 45BC and a side middle-high part 45BS, and a rear middle-high part 45C.
  • a block region BT having a plurality of small absorbing portions 44 surrounded by the horizontal groove portion 43Y and the vertical groove portion 43X is formed from the front portion A to the rear portion C. As shown in FIG.
  • the excretion part middle-high part 45B from the end on the rear part C side in the longitudinal direction X of the middle middle-high part 45BC toward the top located in the middle part of the lateral direction Y in the rear part C, You may have the back gradually decreasing middle high part 45BB formed so that the width
  • the groove part 43 is formed also in the excretion part middle high part 45B, it is easy to bend
  • the absorbent core 41 may contain a deodorant and / or an antibacterial agent. There is no restriction
  • the absorbent article for absorbing menstrual blood of the present invention may be a panty liner (cage sheet) or the like in addition to a sanitary napkin.
  • ⁇ 1> Absorption having an excretion part facing part provided with a longitudinal direction corresponding to the wearer's front-rear direction and a lateral direction perpendicular to the longitudinal direction, having a topsheet and an absorbent core and disposed opposite to the liquid excretion part of the wearer
  • the absorbent article includes a hemagglutinating agent, and the absorbent core has a thin concave portion that is not joined to the topsheet at the excretory part facing part,
  • the hemagglutinating agent is disposed in the excretory part facing part in the excretion part in the absorbent core, or in the excretion part facing part in the constituent member of the absorbent article located on the skin facing surface side of the absorbent core. Goods.
  • the ratio of the total area of the recesses to the area of the excretory part facing part in the excretion part facing part of the absorbent core is 10% or more and 50 % Or less of the absorbent article according to ⁇ 1>.
  • ⁇ 3> The absorbent article according to ⁇ 1> or ⁇ 2>, wherein the depth of the recess is 0.4 mm or more.
  • ⁇ 4> The absorbent article according to any one of ⁇ 1> to ⁇ 3>, wherein the recess is a groove extending in a groove shape.
  • the said recessed part is a groove part extended in groove shape
  • the said absorptive core is a block which has the said comparatively low basis weight and the several small absorption part surrounded by this groove part with a comparatively high basic weight.
  • ⁇ 6> The absorbent article according to any one of ⁇ 1> to ⁇ 5>, wherein the absorbent core has a middle-high portion having a thickness greater than a peripheral portion at a central portion in a lateral direction of the excretory portion-facing portion.
  • the hemagglutinating agent is disposed at a position overlapping the concave portion of the absorbent core and the thickness direction of the absorbent core in the constituent member of the absorbent article located on the skin-opposing surface side of the absorbent core.
  • ⁇ 9> The absorbent article according to any one of ⁇ 1> to ⁇ 8>, wherein the absorbent core is integrally formed.
  • ⁇ 11> The absorbent article according to ⁇ 10>, wherein the compressed groove is in a state where its constituent fibers are heat-sealed.
  • the absorbent core is formed with a rear middle high portion thicker than a peripheral region excluding the middle high portion at a central portion in the lateral direction in the rear portion. The absorbent article as described.
  • the said back middle high part is an absorbent article as described in said ⁇ 12> which has a some small absorption part formed by dividing this back middle high part by the vertical groove part extended in the vertical direction of the said absorbent core.
  • the said back middle high part has an absorptivity as described in said ⁇ 12> or ⁇ 13> which has a some small absorption part formed by dividing this back middle high part by the horizontal groove part extended in the horizontal direction of the said absorptive core. Goods.
  • the middle-high portion has a middle middle-high portion having a vertically long shape in the longitudinal direction of the absorbent core, and a side middle-high portion that bulges laterally outward from each side edge along the longitudinal direction of the middle middle-high portion.
  • hemagglutinating agent is disposed on a skin facing surface side of the absorbent core and overlaps the concave portion of the topsheet and the thickness direction of the absorbent core.
  • the hemagglutinating agent is disposed at a position overlapping the concave portion and the thickness direction of the absorbent core in a core wrap sheet covering the absorbent core, which is located on the skin facing surface side with respect to the absorbent core.
  • ⁇ 22> The absorbent article according to any one of ⁇ 1> to ⁇ 21>, wherein the absorbent article has side flap portions on both lateral sides of the vertical excretory portion-facing portion.
  • ⁇ 23> The absorbent article according to any one of ⁇ 1> to ⁇ 22>, wherein the absorbent article has a compressed groove that forms a ring-shaped circumferential groove.
  • ⁇ 24> The absorbent article according to any one of ⁇ 1> to ⁇ 23>, wherein the absorbent core contains a superabsorbent polymer.
  • ⁇ 25> The absorbent article according to any one of ⁇ 1> to ⁇ 24>, wherein a deodorant is blended in the absorbent core.
  • ⁇ 26> The absorbent article according to any one of ⁇ 1> to ⁇ 25>, wherein an antibacterial agent is blended in the absorbent core.
  • ⁇ 27> The absorbent article according to any one of ⁇ 1> to ⁇ 26>, wherein the recess has a depth of 0.4 mm or more from the skin-facing surface of the absorbent core.
  • Example 1 A sanitary napkin having the same basic structure as that of the sanitary napkin 1 shown in FIGS. 1 and 2 provided with the absorbent body 41 having the absorbent core 41 and the core wrap sheet 42 shown in FIG. Samples of A spunbond nonwoven fabric was used as the top sheet. A moisture-permeable resin film was used as the back sheet. As the leak-proof cuff forming sheet, a spunbond nonwoven fabric was used.
  • the absorbent body is a mixed fiber (absorbent core) containing wood pulp fibers and a superabsorbent polymer, the thickness of the small absorbent part in the peripheral region is 3.7 mm, and the small absorbent part in the middle and high part of the excretory part.
  • the thickness of the part is 6.5 mm, which is 176% of the thickness of the small absorption part in the peripheral area (thickness of the small absorption part in the excretion part middle / high part / thickness of the small absorption part in the peripheral part),
  • the thickness of the small absorption part was 5.0 mm, and was 135% of the thickness of the small absorption part in the peripheral region (the thickness of the small absorption part in the rear middle / high part / the thickness of the small absorption part in the peripheral region).
  • the basic weight of the small absorption part of each excretion part middle high part and back middle high part was 640 g / m ⁇ 2 >, and the basic weight of the small absorption part of a peripheral region was 230 g / m ⁇ 2 >.
  • the basis weight of the vertical groove 43X and the lateral groove 43Y, respectively, was 53g / m 2, 53g / m 2.
  • As the core wrap sheet a tissue paper having a basis weight of 16 g / m 2 and a thickness of 0.3 mm was used, and the whole surface was coated so as to contain a hemagglutinating agent of 6 g / m 2 .
  • the cationic polymer contained in the hemagglutinating agent trade name Marcoat 106 manufactured by Nippon Lubrizol Co., Ltd. (polydiallyldimethylammonium chloride which is a quaternary ammonium salt homopolymer, weight average molecular weight 15,000, IOB value 2) 10 and a streaming potential of 6700 ⁇ eq / L) were used.
  • the grooves arranged in the absorbent core are open on the skin facing surface side, the width is 1.5 mm, the distance between the horizontal grooves is 15 mm, and the distance between the vertical grooves is 14 mm. It was.
  • the groove part in the excretion part opposing part B part had a depth of 4.0 mm from the skin facing surface
  • the groove part in the peripheral part had a depth of 0.55 mm from the skin opposing surface.
  • Example 2 A sanitary napkin having the same basic configuration as that of the sanitary napkin provided with the absorbent body 4 having the absorbent core 41 shown in FIG. 9 was produced, and this was used as a sample of Example 2.
  • the basic configuration other than the above was the same as in Example 1.
  • the groove portions arranged in the absorbent core were opened on the skin facing surface side, the width was 2.0 mm, the interval between the horizontal groove portions was 14 mm, and the interval between the vertical groove portions was 11 mm.
  • the groove part in the excretion part opposing part B was 3.0 mm in depth from the skin opposing surface, and the groove part in the peripheral part was 0.4 mm in depth from the skin opposing surface.
  • the ratio of the sum total of the groove portion to the area of the excretory portion facing portion B of the absorbent core (total area of the groove portion (mm 2 ) / area of the excretory portion facing portion of the absorbent core (2000 mm 2 )) was 0.20 (20%).
  • Example 3 A sanitary napkin having the same basic configuration as the sanitary napkin provided with the absorbent body 4 having the absorbent core 41 shown in FIG. 8 was produced, and this was used as a sample of Example 3.
  • the basic configuration other than the above was the same as in Example 1.
  • the groove portions arranged in the absorbent core were opened on the skin facing surface side, the width was 2.0 mm, the interval between the lateral groove portions was 14 mm, and the interval between the vertical groove portions was 11 mm.
  • the groove part in the excretion part opposing part B was 3.0 mm in depth from the skin opposing surface, and the groove part in the peripheral part was 0.55 mm in depth from the skin opposing surface.
  • the ratio of the sum total of the groove portion to the area of the excretory portion facing portion B of the absorbent core (total area of the groove portion (mm 2 ) / area of the excretory portion facing portion of the absorbent core (2000 mm 2 )) was 0.20 (20%).
  • Example 4 A sanitary napkin having the same basic configuration as the sanitary napkin provided with the absorbent body 4 having the absorbent core 41 shown in FIG. 8 was produced, and this was used as a sample of Example 4.
  • the basic configuration other than the above was the same as in Example 1.
  • the groove portions arranged in the absorbent core were opened on the skin facing surface side, the width was 3.0 mm, the interval between the lateral groove portions was 14 mm, and the interval between the vertical groove portions was 11 mm.
  • the groove part in the excretion part opposing part B was 1.0 mm in depth from the skin opposing surface, and the groove part in the peripheral part was 0.55 mm in depth from the skin opposing surface.
  • the ratio of the sum total of the groove portion to the area of the excretory portion facing portion B of the absorbent core (total area of the groove portion (mm 2 ) / area of the excretory portion facing portion of the absorbent core (2000 mm 2 )) was 0.41 (41%).
  • Example 5 A sanitary napkin having the same basic configuration as the sanitary napkin in which the absorbent body 4 having the absorbent core 41 shown in FIG. 3 is arranged so that the opening of the groove 43 of the absorbent core 41 faces the non-skin facing surface side. This was used as a sample of Example 5.
  • the basic configuration other than the above was the same as in Example 3. However, unlike Example 3, the groove portion arranged in the absorbent core was opened on the non-skin facing surface side.
  • ⁇ Method for evaluating wetback amount> The sanitary napkins obtained in the examples and comparative examples were placed horizontally with the topsheet facing the surface side, and a cylindrical acrylic plate with an inlet having a diameter of 1 cm was placed on the bottom, and simulated blood from the inlet 6 g was injected, and the state was maintained for 1 minute after the injection. Next, the acrylic plate with a cylinder was removed, and 16 sheets of absorbent paper (commercially available tissue paper) having a length of 6 cm ⁇ width of 9.5 cm and a basis weight of 13 g / m 2 were placed on the surface of the top sheet.
  • absorbent paper commercially available tissue paper
  • the absorbent paper was taken out, and the weight of the absorbent paper after pressurization was measured. Then, by subtracting the weight of the absorbent paper before pressurization from the weight of the absorbent paper after pressurization, the weight of the simulated blood absorbed by the paper was calculated and used as the surface liquid return amount.
  • the pseudo-blood as described herein, B-type viscometer (Toki Sangyo Co., Ltd.
  • the sanitary napkins of Examples 1 to 5 did not give discomfort and were more comfortable than the sanitary napkins of Comparative Example 1. Therefore, if the sanitary napkins of Examples 1 to 5 are used, it can be expected that the wearing feeling will be good.
  • the sanitary napkin of Example 1 in which the hemagglutinating agent is arranged and the concave portion is not joined to the top sheet is the sanitary napkin of Comparative Example 2 in which the hemagglutinating agent is not arranged. Compared to the napkin, the amount of wetback is reduced, and it can be expected that the feeling of wearing will be good.
  • the absorption rate for absorbing blood is fast, the discomfort is hardly given, and the wearing feeling is good.

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  • Absorbent Articles And Supports Therefor (AREA)

Abstract

La présente invention concerne un article absorbant (1) qui comprend un noyau absorbant (41) ayant une forme allongée dans une direction avant-arrière, et une partie faisant face à la partie d'évacuation (B) devant être disposée face à une partie d'évacuation de fluide d'un utilisateur. L'article absorbant (1) est pourvu d'un agent d'hémagglutination (8). Le noyau absorbant (41) comporte, sur la partie faisant face à la partie d'évacuation (B), des parties évidées (43) qui ont une épaisseur réduite et ne sont pas reliées à une feuille de surface (2). L'agent d'hémagglutination (8) est disposé dans la partie faisant face à la partie d'évacuation (B) du noyau absorbant (41) ou dans la partie faisant face à la partie d'évacuation (B) d'un élément constitutif de l'article absorbant (1) situé plus loin vers la surface face à la peau que le noyau absorbant (41).
PCT/JP2017/019966 2016-06-03 2017-05-29 Article absorbant WO2017209071A1 (fr)

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JP2019087965A (ja) 2017-11-10 2019-06-06 シャープ株式会社 端末装置、基地局装置、および、通信方法
CN110913818B (zh) * 2018-07-05 2022-05-17 花王株式会社 吸收性物品
JP2020036735A (ja) * 2018-09-04 2020-03-12 花王株式会社 吸収性物品
JP7257220B2 (ja) * 2019-03-29 2023-04-13 花王株式会社 吸収性物品
JP7308658B2 (ja) * 2019-05-21 2023-07-14 花王株式会社 吸収性物品
JP7272862B2 (ja) * 2019-05-23 2023-05-12 花王株式会社 吸収性物品

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JP2015112235A (ja) * 2013-12-11 2015-06-22 花王株式会社 吸収性物品

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JPS57153648A (en) * 1981-02-17 1982-09-22 Kimberly Clark Co Sanitary article containing blood gelling agent
JP2002528232A (ja) * 1998-10-30 2002-09-03 キンバリー クラーク ワールドワイド インコーポレイテッド 流体処理剤を備える吸収性物品
US20030124936A1 (en) * 1998-10-30 2003-07-03 Potts David Charles Absorbent article with fluid treatment agent
JP2011520532A (ja) * 2008-05-19 2011-07-21 ザ プロクター アンド ギャンブル カンパニー カチオン性化工デンプンを含む吸収性製品
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JP2014104093A (ja) * 2012-11-27 2014-06-09 Kao Corp 吸収性物品
JP2015112235A (ja) * 2013-12-11 2015-06-22 花王株式会社 吸収性物品

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JP6674326B2 (ja) 2020-04-01
JP2017217077A (ja) 2017-12-14
CN108882999B (zh) 2020-12-22

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