WO2021234880A1 - Couche jetable - Google Patents

Couche jetable Download PDF

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Publication number
WO2021234880A1
WO2021234880A1 PCT/JP2020/020020 JP2020020020W WO2021234880A1 WO 2021234880 A1 WO2021234880 A1 WO 2021234880A1 JP 2020020020 W JP2020020020 W JP 2020020020W WO 2021234880 A1 WO2021234880 A1 WO 2021234880A1
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WO
WIPO (PCT)
Prior art keywords
absorber
central
disposable diaper
less
longitudinal direction
Prior art date
Application number
PCT/JP2020/020020
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English (en)
Japanese (ja)
Inventor
今日子 柘植
優子 福田
泰之 奥田
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.)
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Publication date
Application filed by 花王株式会社 filed Critical 花王株式会社
Priority to PCT/JP2020/020020 priority Critical patent/WO2021234880A1/fr
Publication of WO2021234880A1 publication Critical patent/WO2021234880A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • A61F13/496—Absorbent articles specially adapted to be worn around the waist, e.g. diapers in the form of pants or briefs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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

Definitions

  • the present invention relates to disposable diapers.
  • a general absorbent article such as a disposable diaper is provided with an absorbent body having an absorbent core as a liquid absorbing site for absorbing body fluid such as urine.
  • an absorbent article having an absorbent core having a plurality of regions is disclosed. Each of these plurality of regions is divided by recesses such as slits and grooves, or by making the thickness and basis weight of each region different.
  • the present invention comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the absorber including an absorbent core, orthogonal to the longitudinal direction and the longitudinal direction. It has a width direction and is located between the dorsal part arranged on the dorsal side of the wearer, the ventral side part arranged on the ventral side, and the ventral part and the dorsal part at the time of wearing.
  • the absorber is located on both sides of the central absorber extending in the longitudinal direction and the width direction of the central absorber, and a pair of sides standing up from the skin facing surface side of the central absorber in a worn state.
  • the absorbent core has a central region in the central absorber and a side region in the side absorber, and the basis weight of the central region is preferably smaller than the basis weight of the side region.
  • 160 g of artificial urine is injected into the disposable diaper at an injection point 7 cm away from the central position in the longitudinal direction and the center in the width direction to the ventral side in the longitudinal direction, and the diaper is allowed to stand for 5 minutes.
  • the side region of the absorbent core is wider and thicker than the central region.
  • 1/2 of the width of the central region is smaller than the thickness of each of the side regions.
  • the present invention comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the absorber including an absorbent core, orthogonal to the longitudinal direction and the longitudinal direction. It has a width direction and is located between the dorsal part arranged on the dorsal side of the wearer, the ventral side part arranged on the ventral side, and the ventral part and the dorsal part at the time of wearing.
  • the absorber is located on both sides of the central absorber extending in the longitudinal direction and the width direction of the central absorber, and a pair of sides standing up from the skin facing surface side of the central absorber in a worn state.
  • the central absorber preferably has a non-stacked portion in which the material forming the absorbent core is not present. 160 g of artificial urine is injected into the disposable diaper at an injection point 7 cm away from the central position in the longitudinal direction and the center in the width direction to the ventral side in the longitudinal direction, and the diaper is allowed to stand for 5 minutes.
  • the side absorber In the reference swelling state, it is preferable that the side absorber has a longer width and a larger thickness than the central absorber. In the reference swelling state, it is preferable that 1/2 of the width of the central absorber is smaller than the thickness of each of the side absorbers.
  • FIG. 1 is a perspective view showing an embodiment of the disposable diaper of the present invention.
  • FIG. 2 is a developed plan view schematically showing the skin-facing surface side of the disposable diaper shown in FIG. 1 in the unfolded and stretched state.
  • FIG. 3 is a sectional view taken along line II-II shown in FIG.
  • FIG. 4 is a view showing a central region and a side region of the absorber in the reference swelling state, and is a cross-sectional view taken along the width direction of the absorber.
  • FIG. 5 is a cross-sectional view of a diaper in a swollen state, showing the inseam deformed in the wearing state together with the crotch portion of the wearer, along the width direction of the diaper.
  • FIG. 1 is a perspective view showing an embodiment of the disposable diaper of the present invention.
  • FIG. 2 is a developed plan view schematically showing the skin-facing surface side of the disposable diaper shown in FIG. 1 in the unfolded and stretched state.
  • FIG. 3 is
  • FIG. 6 is an explanatory diagram for explaining a method of measuring a 30 mm compressive load.
  • FIG. 7 is a cross-sectional view showing the thickness of the absorber when the absorber in the reference swelling state is bent along the longitudinal direction thereof.
  • FIG. 8 is a plan view showing the positional relationship between the absorbent core shown in FIG. 2 and the leakage-proof cuff.
  • FIG. 9 is a cross-sectional view of the absorber shown in FIG.
  • FIG. 10 is a plan view showing still another embodiment of the absorbent core according to the present invention.
  • 11 (a) and 11 (b) are diagrams corresponding to FIG. 4 showing another embodiment of the absorbent core according to the present invention.
  • Patent Document 1 As an absorbent article comprising an absorbent core having a plurality of regions, the applicant has previously made both sides of the crotch portion of the absorbent body including the absorbent core stand upright, and the central absorber. , A pair of side absorbers, and a disposable diaper provided with an absorber having a cut-off portion formed between these absorbers (Patent Document 1).
  • Patent Document 2 includes one or more areas that are substantially free of absorbent material, through which the upper surface of the core wrap encapsulating the absorbent material is adhered to the bottom surface of the core wrap and is absorbent.
  • An absorbent article is disclosed in which the core wrap forms a channel along the area upon swelling of the material.
  • Patent Document 3 discloses an absorbent article including an upper layer absorber and a lower layer absorber, and a concave groove that divides these absorbers into a plurality of regions.
  • the absorbent core is usually composed of an absorbent material such as a water-absorbent polymer, it swells when it absorbs a body fluid such as urine. If this absorbent core swells too much, the entire disposable diaper may become excessively bulky and the wearer's thighs may come into contact with the disposable diaper, limiting the wearer's movements. In particular, when the movement around the thigh is restricted, it becomes difficult to walk, which may hinder infants and the like from learning to walk and elderly people and the like from performing walking rehabilitation.
  • Patent Documents 1 to 3 do not disclose a technique for facilitating the movement of the wearer around the thigh even when the absorbent core is swollen.
  • the present invention relates to a disposable diaper that facilitates the wearer's movement even when the absorbent core is swollen.
  • FIG. 1 and 2 show a pants-type disposable diaper 1 (hereinafter, also simply referred to as a diaper 1), which is an embodiment of the absorbent article of the present invention.
  • the diaper 1 includes a ventral portion A arranged on the ventral side of the wearer and a dorsal portion B arranged on the dorsal side of the wearer when the diaper 1 is worn. It has a crotch lower part C located between them.
  • the diaper 1 has a longitudinal direction X corresponding to a direction corresponding to the front-back direction of the wearer, that is, a direction extending from the ventral portion A to the dorsal portion B via the crotch portion C, and a width direction Y orthogonal to the longitudinal direction X.
  • the diaper 1 is formed symmetrically with respect to the longitudinal center line CL extending in the longitudinal direction X and bisectly dividing the diaper 1 in the width direction Y.
  • the diaper 1 is provided with an absorbent main body 10 having an absorbent body 4 in the central portion in the width direction Y, and the non-skin facing surface side of the absorbent main body 10, that is, a side farther from the wearer's body than the absorbent main body 10. It is provided with an exterior body 5 arranged in.
  • the absorber 4 extends between the ventral portion A and the dorsal portion B, and has a liquid-retaining absorbent core 40 and a core wrap sheet 48 that contacts the outer surface thereof and covers the absorbent core 40. It is composed including and.
  • both side edges of the exterior body 5 along the longitudinal direction X in each of the ventral side portion A and the dorsal side portion B are known as an adhesive such as a hot melt type adhesive, a heat seal, an ultrasonic seal, or the like.
  • the "skin facing surface” is a surface of an absorbent article such as a disposable diaper or a component thereof (for example, a surface sheet) that is directed toward the skin side of the wearer when the absorbent article is worn, that is, relatively.
  • the side closer to the wearer's skin, the “non-skin facing surface” is the surface of the absorbent article or its constituents that faces the opposite side of the skin when the absorbent article is worn, i.e., relative to the wearer.
  • the side far from the skin i.e., relative to the wearer.
  • "when worn” and “wearing state” mean a state in which a normal proper wearing position, that is, a correct wearing position of the absorbent article is maintained.
  • the absorbent body 10 has a rectangular shape in a plan view in the unfolded and extended state of the diaper 1 as shown in FIG. 2, and extends in the longitudinal direction X from the ventral side A to the dorsal side B. It is arranged in the central portion of the exterior body 5 in the width direction Y so as to coincide with the longitudinal direction X of the diaper 1 in the expanded and extended state, and is joined to the exterior body 5 by an adhesive.
  • the "expanded and extended state" of the diaper 1 means that the diaper 1 is separated by the side seal portion S to be in the expanded state, and the diaper 1 in the expanded state is extended with the elastic members of each part to have design dimensions (the influence of the elastic members is completely affected). It means the state of being expanded until it becomes the same as the dimensions when it is expanded in a plane with it removed.
  • the absorbent main body 10 has a liquid-permeable surface sheet 2 that forms a skin-facing surface, and a liquid-impermeable, liquid-impermeable, or water-repellent back sheet 3 that forms a non-skin-facing surface.
  • a liquid-retaining absorber 4 arranged between the sheets 21 and 22, and these are integrated by a known joining means such as an adhesive.
  • the surface sheet 2 of the present embodiment covers the skin-facing surface side of the absorber 4, and both end portions thereof are folded back to the non-skin-facing surface side of the absorber 4.
  • various types conventionally used for this kind of absorbent article can be used without particular limitation.
  • the front surface sheet 2 various non-woven fabrics, perforated films and the like can be used
  • a resin film, a laminate of the resin film and the non-woven fabric and the like can be used.
  • the absorber 4 has a rectangular shape long in the longitudinal direction X in a plan view as shown in FIG. 2, and extends in the longitudinal direction X from the ventral side portion A to the dorsal side portion B.
  • the positions of both ends of the absorbent body 4 in the longitudinal direction X substantially coincide with the positions of both ends of the absorbent body 10 in the longitudinal direction X.
  • the absorbent main body 10 is composed of a pair of liquid-resistant or water-repellent and breathable leak-proof cuff forming sheets 62 on both sides of the skin-facing surface along the longitudinal direction X. It is equipped with leak-proof cuffs 6 and 6.
  • Each leak-proof cuff 6 includes one or more thread-shaped elastic members 61 for forming a leak-proof cuff arranged in an extended state in the longitudinal direction X. As the elastic member 61 contracts when the diaper 1 is worn, the leak-proof cuff 6 stands up at least in the inseam C.
  • the strip-shaped leak-proof cuff forming sheet 62 is folded in half along the longitudinal direction thereof, and the leak-proof cuff forming elastic member 61 is fixed between the opposing sheets in an extended state, and the relative thereof. It is formed by joining the facing sheets together.
  • the exterior body 5 forms the outer shape of the diaper 1 in the expanded and extended state as shown in FIG. 2, and the peripheral edge of the exterior body 5 forms the contour line of the diaper 1 in that state, that is, the ventral portion A, the inseam C, and the crotch portion C.
  • the contour lines of each of the dorsal portions B are formed.
  • both side edges of the exterior body 5 along the longitudinal direction X are curved in a convex arc shape toward the center in the width direction Y, and the exterior body 5 is curved in the longitudinal direction.
  • the central region of X is constricted inward in the width direction Y.
  • the exterior body 5 includes an outer layer sheet 51 forming the outer surface of the diaper 1, that is, a non-skin facing surface, an inner layer sheet 52 arranged on the skin facing surface side of the outer layer sheet 51, and these. It has a plurality of elastic members 55, 56, 57 arranged between both sheets 51, 52. As shown in FIG. 2, the exterior body 5 of the present embodiment has a waistline elastic member 55 located on the outer side of the absorbent body 10 in the longitudinal direction X, and both ends of the absorbent body 10 in the same direction X. It has an elastic member 56 located on the inner side of the member.
  • the elastic member 56 arranged at a position overlapping the absorbent main body 10 in the longitudinal direction X is arranged so as not to exhibit elastic elasticity by a treatment such as finely dividing the elastic member 56 in a region overlapping the absorbent main body 10 in the thickness direction. May be.
  • a plurality of thread-like or band-shaped elastic members 55, 56 are arranged in a stretched state in the width direction Y on each of the ventral side portion A and the dorsal side portion B, and the plurality of elastic members 55, 56 are longitudinally arranged. They are intermittently arranged at predetermined intervals in the direction X.
  • the elastic members 55 and 56 are arranged in a state in which the elastic elasticity is exhibited, so that the elastic members 55 and 56 are substantially continuous over the entire circumference of the opening edge of the waist opening WH. Circular waist gathers (folds) are formed.
  • the leg elasticity for forming one or a plurality of thread-like or band-shaped leg gathers is formed on the leg edge LS forming the opening edge of each of the leg openings LH.
  • the members 57 are arranged in an extended state, whereby substantially continuous annular leg gathers are formed at the opening edges of the leg openings LH over the entire circumference thereof.
  • the elastic members 55, 56, 57 in the exterior body 5 are all sandwiched and fixed between the outer layer sheet 51 and the inner layer sheet 52 constituting the exterior body 5 by a joining means such as an adhesive.
  • the absorbent main body 10 of the present embodiment has elastic members 11a and 11b extending in the longitudinal direction X on both sides of the absorber 4 in the width direction Y.
  • the leak-proof cuff side elastic member 11a fixed in an extended state between the leak-proof cuff forming sheets 62 on both sides of the width direction Y of the absorber 4, and the absorber 4 and the surface thereof.
  • It has an absorber-side elastic member 11b fixed in an extended state between the sheet 2 and the sheet 2.
  • both ends of the elastic member are fixed by an adhesive or the like on the ventral side A and the dorsal side B.
  • the elastic member 61 for forming the leak-proof cuff contracts along the longitudinal direction X, and the elastic member 11a on the leak-proof cuff side and the elastic member 11b on the absorber side each contract in the longitudinal direction.
  • both side portions of the absorbent main body 10 along the longitudinal direction X are more likely to stand up on the skin facing surface side than between the two side portions.
  • Such a configuration also contributes to the standing of the pair of side absorbers 4S and 4S in the absorber 4 from the skin facing surface side of the central absorber 4C.
  • the absorber 4 is located on both sides of the central absorber 4C extending in the longitudinal direction and the width direction Y of the central absorber 4C, and the skin of the central absorber 4C in the worn state. It has a pair of side absorbers 4S and 4S that stand up from the facing surface side.
  • the standing of the pair of side absorbers 4S, 4S may contribute, for example, to the absorption core 40 described later, that the basis weight of the central region 41 is smaller than the basis weight of the side region 43. Such a configuration will be described later.
  • the side absorber 4S may be configured to stand up from the central absorber 4C in the reference swelling state described later, or may be configured to stand up from the central absorber 4C in the state before the absorber 4 absorbs the liquid. You may be.
  • FIG. 3 shows the side absorber 4S in a non-standing state.
  • the absorber 4 includes an absorbent core 40 and a core wrap sheet 48 that covers the surface of the absorbent core 40.
  • the absorbent core 40 is configured to include an absorbent material such as a water-absorbent polymer 46 and a fiber material (not shown). As shown in FIG. 2, the absorbent core 40 has a long shape in one direction.
  • the absorbent core 40 has a central region 41 in the central absorber 4C and a side region 43 in the side absorber 4S, at least in the inseam C.
  • the central region 41 and the side region 43 are continuous in the width direction Y.
  • the central region 41 and the side region 43 are collectively covered with one core wrap sheet 48.
  • the basis weight of the central region 41 is smaller than the basis weight of the side region 43.
  • the central region 41 of the present embodiment is a low fiber stacking portion in which the amount of fiber stacking of the core forming material forming the absorbent core 40 is smaller than that of the side region 43.
  • the thicknesses of the central region 41 and the side region 43 are different from each other due to the difference in basis weight between the central region 41 and the side region 43 (see FIG. 3).
  • a model of a diaper in which excrement is excreted can be prepared by the following method. First, the unused diaper (product) is unfolded and stretched to the center position on the skin-facing surface of the surface sheet 2, which is the center of the diaper 1 in the longitudinal direction X and the center of the width direction Y. Make a mark (hereinafter referred to as "first mark") using an oil-based pen. Another mark is placed at a position 7 cm away from the central position marked with the first mark on the ventral side A side in the longitudinal direction X, and the position marked with the other mark is defined as the injection point of artificial urine.
  • a state is also referred to as a "drooping state".
  • 160 g of artificial urine is injected at the injection point at an injection rate of 5 g / sec.
  • a tube pump can be used for injection.
  • the diaper 1 is allowed to stand in the drooping state for 5 minutes.
  • This state is also referred to as a "reference swelling state”.
  • 160 g of artificial urine corresponds to the amount of urine excreted 3 to 4 times for infants.
  • composition of artificial urine is as follows. Urea 1.94% by mass, sodium 0.7954% by mass, magnesium sulfate (hepatic hydrate) 0.11058% by mass, calcium chloride (dihydrate) 0.06208% by mass, potassium sulfate 0.19788% by mass. , Polyoxyethylene lauryl ether 0.0035% by mass and ion-exchanged water (remaining amount).
  • FIG. 4 shows a cross-sectional view of the absorber 4 in the reference swollen state along the width direction Y.
  • the absorbent core 40 that has swollen by absorbing a liquid such as urine has a longer width and a larger thickness than the state before absorbing the liquid.
  • the width of the side region 43 and the central region 41 becomes longer, and the thickness becomes larger.
  • the "width" is the length in the width direction Y.
  • the side region 43 is wider and thicker than the central region 41, as shown in FIG.
  • 1/2 of the width W1 of the central region 41 is smaller than the thickness t3 of each of the side regions 43.
  • “1/2 of the width W1 of the central region 41” is indicated by the reference numeral Wa.
  • the diaper 1 of the present embodiment has a U-shaped cross section along the width direction Y in the inseam C under the wearing state and the swollen state in which liquid such as urine is absorbed.
  • Easy to deform More specifically, the central region 41 becomes the bottom, and each of the pair of side regions 43, 43 located on both sides of the central region 41 in the width direction Y stands up from the skin facing surface side of the central region 41.
  • the entire inseam C, specifically, the absorber 4 in the inseam C is easily U-shaped. In this U-shaped deformation, since the side region 43 has a larger basis weight than the central region 41, a flexible shaft is formed at the boundary portion between the central absorber 4C and the side absorber 4S in the wearing state.
  • the side absorber 4S standing upright.
  • the width and thickness of the side region 43 are larger than those of the central region 41, and 1/2 of the width W1 of the central region 41 is smaller than the thickness t3 of each side region 43.
  • the U-shape formed by the deformed absorber 4 tends to fit compactly in the width direction Y, and can effectively suppress the entire crotch portion C of the diaper 1 from becoming bulky in the width direction Y. Such an effect is exhibited even in a swollen state in which a liquid such as urine is absorbed.
  • the pressure of the wearer's thighs F and F by the diaper 1 is effectively suppressed even in the swollen state, and the thigh F is for the wearer. It is difficult to limit the movement around you. That is, since the diaper 1 is unlikely to interfere with walking even in the swollen state in which the liquid is absorbed, the wearer of the diaper 1 can easily walk.
  • these regions 41 and 43 can be specified by the thickness difference.
  • the widths of the absorbent cores 40 in the inseam C are different, the widths of the central region 41 and the side regions 43 are the widths in the narrowest portion where the width of the absorbent cores 40 is the shortest. do.
  • the width of the narrowest portion where the width of the central region 41 is the shortest is defined as the width W1 of the central region 41, and the side region.
  • the narrowest portion where the width of 43 is the shortest is defined as the width W2 of the side region 43.
  • the widths of the central region 41 and the side regions 43 in the reference swollen state shall be measured in the state of the absorber in which the absorbent core is covered with the core wrap sheet.
  • each of the central absorber 4C and the side absorber 4S in the reference swelling state, and the thickness of the central region 41 and the side region 43 are measured by the following methods.
  • the absorber 4 is taken out from the diaper 1 in the reference swollen state.
  • the absorber 4 is placed in a horizontal place so that the surface facing the skin faces upward in the vertical direction without wrinkles or bending.
  • PEACOCK DIAL UPRIGHT GAUGES R5-C manufactured by OZAKI MFG.CO.LTD.
  • the thickness of each of the central absorber 4C and the side absorber 4S is measured under a load of 5 cN / cm 2.
  • the thickness of the portion where the central region 41 exists in the central absorber 4C or the portion where the side region exists in the side absorber 4S is measured.
  • a circular or square plate (acrylic plate with a thickness of about 5 mm) whose size is adjusted so that the load is 5 cN / cm 2 is placed between the tip of the thickness gauge and the sample. And measure the thickness.
  • the thickness of the central region 41 is small and the core wrap sheet 48 in the central region 41 floats from the absorbent core 40, it is absorbed along the boundary portion between the central region 41 and the side region 43.
  • the body is separated, and the thickness of the central absorber 4C is measured so that the absorbent core 40 and the core wrap sheet 48 in the separated portion are in contact with the separated portion.
  • the above measurement is performed at any five points in the central range in the longitudinal direction for each of the portion where the central region 41 exists in the central absorber 4C and the portion where the side region 43 exists in the side absorber 4S. Then, the average value of the measured values at these five points is taken as the thickness of the central absorber 4C or the side absorber 4S.
  • the value obtained by subtracting the thickness of the core wrap sheet 48 from the thickness of the central absorber 4C is defined as the thickness of the central region 41
  • the value obtained by subtracting the thickness of the core wrap sheet 48 from the thickness of the side absorber 4S is defined as the side region 43.
  • the "center range in the longitudinal direction” is a range within 5 cm on each side of the same direction X from the horizontal line extending in the width direction Y and passing through the center of the longitudinal direction X in the absorber 4, that is, the ventral side from the horizontal line in the longitudinal direction X.
  • the range is within 5 cm on each of the part A side and the dorsal side B side.
  • the thickness of the central absorber 4C is the total thickness of the core wrap sheets existing in the central absorber 4C.
  • W2 / W1 which is the ratio of W2 to W1 is preferably 1. .1 or more, more preferably 1.5 or more, preferably 7 or less, more preferably 3 or less, and preferably 1.1 or more and 7 or less, more preferably 1.5 or more and 3 or less.
  • the width W1 (see FIG. 4) of the central region 41 in the reference swollen state is preferably 5 mm or more, more preferably 10 mm or more, preferably 35 mm or less, more preferably 30 mm or less, and preferably 5 mm or more and 35 mm. Below, it is more preferably 10 mm or more and 30 mm or less.
  • the width W2 (see FIG. 4) of the side region 43 in the reference swollen state is preferably 35 mm or more, more preferably 40 mm or more, preferably 60 mm or less, more preferably 55 mm or less, and preferably 35 mm or more and 60 mm. Below, it is more preferably 40 mm or more and 55 mm or less.
  • t3 / t2 which is the ratio of t3 to t2, is preferably 1. .3 or more, more preferably 2 or more, preferably 40 or less, more preferably 30 or less, and preferably 1.3 or more and 40 or less, more preferably 2 or more and 30 or less.
  • the thickness t2 (see FIG. 4) of the central region 41 in the reference swollen state is preferably 0.5 mm or more, more preferably 1 mm or more, preferably 15 mm or less, more preferably 10 mm or less, and preferably 0.
  • the thickness t3 (see FIG. 4) of the side region 43 in the reference swollen state is preferably 10 mm or more, more preferably 15 mm or more, preferably 30 mm or less, more preferably 25 mm or less, and preferably 10 mm or more and 30 mm. Below, it is more preferably 15 mm or more and 25 mm or less.
  • t3 / Wa which is the ratio of t3 to Wa, is preferable. Is 1.01 or more, more preferably 1.1 or more, preferably 3 or less, more preferably 2.5 or less, and preferably 1.01 or more and 3 or less, more preferably 1.1 or more 2 It is less than 5.5.
  • the test piece 1a in which the diaper 1 is bent along the longitudinal direction X so as to divide the width of the diaper 1 into two equal parts is imitated by the diaper 1 that has absorbed urine or the like in the crotch portion of the wearer.
  • the compression load hereinafter referred to as 30 mm compression load
  • the test piece 1a is compressed to a thickness of 30 mm in the crotch portion C is in the range described later.
  • the 30 mm compression load of the test piece 1a is preferably 7N or less, more preferably. It is 6.5 N or less, preferably 0.1 N or more and 7 N or less, and more preferably 1 N or more and 6.5 N or less.
  • the 30 mm compressive load is measured by the following method.
  • the diaper is expanded and extended, and the width of the diaper is divided into two equal parts, that is, the diaper is bent along the longitudinal center line CL, and this is used as the test piece 1a.
  • the test piece 1a is placed in a horizontal place so that the longitudinal direction X coincides with the horizontal direction and there is no wrinkle or bending.
  • the test piece 1a is referred to as a longitudinal X center position (hereinafter referred to as "first measurement position") and a position 2.5 cm away from the center position on the ventral side A side (hereinafter referred to as "second measurement position"). ),
  • a rectangular acrylic plate having a width of 5 cm and a length of 15 cm and a weight of 28.7 g is placed.
  • the acrylic plate is placed so that the width of the acrylic plate coincides with the longitudinal direction X of the diaper and the center of the width coincides with the first measurement position or the second measurement position.
  • the acrylic plate is moved downward at a compression rate of 100 mm / min and compressed until the thickness of the test piece 1a reaches 30 mm.
  • a material testing machine for example, Autograph AG-X manufactured by Shimadzu Corporation
  • the compressive load when the thickness of the diaper reaches 30 mm at each of the first measurement position and the second measurement position is measured, and the average value of these two points is taken as the 30 mm compressive load.
  • the compression load (hereinafter referred to as "10 mm compression load”) when the side absorber 4S in the reference swelling state is compressed to a thickness of 10 mm correlates with the 30 mm compression load. That is, by adjusting the 10 mm compressive load of the side absorber 4S, the 30 mm compressive load of the test body 1a can be adjusted within the above range.
  • the 10 mm compressive load in at least one side absorber 4S is preferably 4.5 N or less, more preferably 4 N or less, and preferably 0.1 N or more and 4.5 N or less, more preferably 0.5 N or more. It is 4N or less.
  • the 10 mm compressive load in both of the pair of side absorbers 4S and 4S is within the above range.
  • the method for measuring the 10 mm compressive load of the side absorber 4S is as follows. First, the absorber 4 is taken out from the diaper in the reference swollen state, and placed on a horizontal place so that the skin-facing surface of the absorber 4 faces upward in the vertical direction without wrinkles or bending. Next, the side absorber 4S was compressed until the thickness became 10 mm using a material tester (for example, Autograph AG-X manufactured by Shimadzu Corporation) equipped with a rod-shaped compression test jig having a diameter of 2 cm. Measure the compressive load at the time. This measurement is performed at any three points in the side absorber 4S where the absorbent core 40 is located, and the average value of these is taken as a 10 mm compression load.
  • a material tester for example, Autograph AG-X manufactured by Shimadzu Corporation
  • the absorber 4 is bent along its longitudinal direction so as to divide the width of the absorber 4 into two equal parts in the reference swelling state.
  • the thickness t1 (see FIG. 7) of the absorber 4 in the lower crotch C is preferably 20 mm or more, more preferably 25 mm or more, preferably 60 mm or less, more preferably 50 mm or less, and more preferably. It is 20 mm or more and 60 mm or less, more preferably 25 mm or more and 50 mm or less.
  • Such a thickness is measured by the same method as the above-described method for measuring the thickness of the absorber, except that the sample is bent so as to divide the width into two equal parts. In the measurement, the above-mentioned circular or square plate is made horizontal.
  • the basis weights of the side region 43 and the central region 41 are within the following ranges. Is preferable. Such basis weight is measured in the state before absorbing the liquid.
  • the preferred basis weight of the side regions 43 described below is not the total basis weight of the pair of side regions 43, 43, but the basis weight of each side region 43.
  • B2 / B1 which is the ratio of B2 to B1 is preferably 1.1 or more, more preferably 3 or more, and also.
  • the basis weight B1 of the central region 41 is preferably 1 g / m 2 or more, more preferably 5 g / m 2 or more, preferably 200 g / m 2 or less, more preferably 100 g / m 2 or less, and more preferably. Is 1 g / m 2 or more and 200 g / m 2 or less, more preferably 5 g / m 2 or more and 100 g / m 2 or less.
  • the basis weight B2 of the side region 43 is preferably 80 g / m 2 or more, more preferably 150 g / m 2 or more, and preferably 700 g / m 2 on condition that the basis weight B2 of the side region 43 is larger than the basis weight B1 of the central region 41.
  • it is more preferably 600 g / m 2 or less, preferably 80 g / m 2 or more and 700 g / m 2 or less, and more preferably 150 g / m 2 or more and 600 g / m 2 or less.
  • the side region 43 of the absorbent core 40 is thicker than the central region 41 in the state before absorbing the liquid. Is preferable. Since the central region 41 is thinner than the side region 43 in this way, the absorbent core 40 is easily bent from the central region 41 as a starting point. From the same viewpoint as above, in the state before the absorbent core 40 absorbs the liquid, the thickness of the central region 41 is t2'(see FIG. 9), and the thickness of the side region 43 is t3'(see FIG. 9).
  • t3'/ t2' which is the ratio of t3'to t2', is preferably 1.1 or more, more preferably 3 or more, preferably 15 or less, more preferably 10 or less, and more preferably. Is 1.1 or more and 15 or less, more preferably 3 or more and 10 or less.
  • the thickness t2'(see FIG. 9) of the central region 41 before the absorbent core 40 absorbs the liquid is preferably 0.5 mm or more, more preferably 1 mm or more, and preferably 8 mm or less, more preferably 5 mm. It is less than or equal to, preferably 0 mm or more and 8 mm or less, and more preferably 3 mm or more and 5 mm or less.
  • the thickness t3'(see FIG. 9) of the side region 43 before the absorbent core 40 absorbs the liquid is larger than the thickness t2'(see FIG. 9) of the central region 41 before the absorbent core 40 absorbs the liquid.
  • it is preferably 2 mm or more, more preferably 5 mm or more, preferably 15 mm or less, more preferably 10 mm or less, and preferably 2 mm or more and 15 mm or less, more preferably 5 mm or more and 10 mm or less. ..
  • the central region 41 in the present embodiment extends over the entire length of the side region 43 in the longitudinal direction X, and has the same width over the entire length. That is, the width of the central region 41 is constant over the overall length of the absorbent core 40 in the longitudinal direction.
  • the width W1 of the central region 41 in the reference swollen state is preferably 5 mm or more, more preferably 10 mm or more, and preferably 35 mm or less, more preferably 30 mm or less. Yes, and more preferably 5 mm or more and 35 mm or less, and more preferably 10 mm or more and 30 mm or less.
  • the absorbent core 40 may have at least a central region 41 and a side region 43 in the inseam C, and either or both of these regions 41 and 43 may be in the ventral portion A and the dorsal portion B. It may extend to either or both of the absorbent cores 40. As shown in FIG. 8, the absorbent core 40 of the present embodiment has a central region 41 and a side region 43 over the entire length in the longitudinal direction X.
  • the length L10 of the overlap between the leak-proof cuff 6 and the absorbent core 40 in the width direction Y (see FIG. 8). ) Is preferably shorter than the width W2'(see FIG. 9) of the side region 43 before absorbing the liquid.
  • the length L10 of the overlap between the leak-proof cuff 6 and the absorbent core 40 in the width direction Y and the width W2'of the side region 43 before absorbing the liquid shall be within the following ranges. Is preferable.
  • the length L10 of the overlap between the leak-proof cuff 6 and the absorbent core 40 in the width direction Y is measured in the unfolded and stretched diaper 1 before absorbing the liquid.
  • the ratio of L10 to W2' is L10. / W2'is preferably 0.1 or more, more preferably 0.15 or more, preferably 0.70 or less, more preferably 0.60 or less, and preferably 0.1 or more and 0.70.
  • it is more preferably 0.15 or more and 0.60 or less.
  • the length L10 of the overlap between the leak-proof cuff 6 and the absorbent core 40 in the width direction Y is preferably 5 mm or more, more preferably 8 mm or more, preferably 40 mm or less, more preferably 30 mm or less, and also. It is preferably 5 mm or more and 40 mm or less, and more preferably 8 mm or more and 30 mm or less.
  • the width W2'of the side region 43 before absorbing the liquid is preferably 33 mm or more, more preferably 38 mm or more, preferably 58 mm or less, more preferably 53 mm or less, and preferably 33 mm or more and 58 mm or less. More preferably, it is 38 mm or more and 53 mm or less.
  • the side region 43 is thicker than the central region 41 both before absorbing the liquid and in the reference swollen state. That is, before and after swelling, the side region 43 is thicker than the central region 41.
  • the side region 43 and the central region 41 may have the same thickness before absorbing the liquid.
  • Such a configuration is preferable in that large irregularities are less likely to be formed on the surface of the diaper before it absorbs the liquid, and the appearance is kept better.
  • the side region 43 swells more than the central region 41, and the thickness of the side region 43 becomes larger than the thickness of the central region 41.
  • the central region 41 is a low basis weight portion having a lower basis weight than the side region 43, but instead, the central absorber 4C has a non-stacked portion in which the core forming material does not exist. You may have. Further, as in the embodiment shown in FIG. 11B described later, the core forming material may not be present in the central absorber 4C. Even when the central absorber 4C has a non-stacked portion, the side absorber 4S is wider and thicker than the central absorber 4C in the reference swelling state, and is 1 of the width of the central absorber 4C. If / 2 is smaller than the thickness of each of the side absorbers 4S and 4S, the diaper wearer can easily walk as described above. That is, the inseam C is easily deformed into the above-mentioned U shape, and the entire inseam C can be effectively suppressed from being bulky in the width direction Y.
  • a known fiber stacking device is used for the absorbent core in which the central region 41 is a low basis weight portion having a lower basis weight than the side region 43, or the absorbent core having a non-stacked fiber portion in the portion where the central region 41 becomes a central region 41.
  • the fiber stacking device is typically provided with a rotating drum having a recess for integration on the outer peripheral surface, and while rotating the rotating drum, the core forming material is supplied to the outer peripheral surface in a scattered state to accumulate the core forming material.
  • the fibers are stacked in the collecting recess by suction from the bottom surface of the collecting recess, and the fiber stack in the collecting recess is separated from the collecting recess by suction from the suction means arranged opposite to the collecting recess.
  • a device that transfers onto a suction means In the fiber stacking device having such a configuration, a non-breathable member or a non-breathable member is arranged in a part of the breathable bottom surface in the accumulation recess, and a part of the bottom surface is a non-breathable part or a poorly ventilated portion.
  • an absorbent core having a central region 41 and a side region 43 having different basis weights, and an absorbent core having a non-stacked fiber portion in the portion to be the central region 41. can be formed.
  • the non-breathable portion or the poorly breathable portion can be formed.
  • the corresponding portion is the central region 41, and the portion corresponding to the other portion on the bottom surface is the side region 43, and an absorbent core 40 having both of these regions can be obtained.
  • the central region 41 is a low basis weight portion having a basis weight lower than that of the side region 43, and the central region 41 is a non-stacked fiber. It can be applied to both forms having parts. Further, the description of the embodiment shown in FIGS. 10 and 11 is applied to the state before the absorbent core 40 absorbs the liquid, unless otherwise specified as the “reference swelling state”.
  • the absorbent core 40 in the above-described embodiment has linear edges on both sides along the longitudinal direction X and is parallel to the longitudinal direction X over the entire length of the absorbent core.
  • the absorbent core may have different widths in the longitudinal direction X.
  • the absorbent core 40c shown in FIG. 10 has a constricted portion 44 in which both side edges c1 and c2 along the longitudinal direction X are constricted inside in the width direction Y.
  • the absorbent core 40c has the constriction 44 on the ventral side A side of the center of the longitudinal direction X. It is preferable to have.
  • the constricted portion 44 is preferably arranged on the crotch portion C in the diaper 1, and is arranged on the ventral side A side of the crotch portion C in the longitudinal direction X rather than the center. More preferred.
  • the absorbent core 40c shown in FIG. 10 has a central region 41 having a length shorter than the total length of the absorbent core 40 in the longitudinal direction X. From the viewpoint of facilitating the deformation of the diaper 1 in the inseam C, the length L1 of the central region 41 in the longitudinal direction X (see FIG. 10) and the length L5 of the absorbent core 40c in the longitudinal direction X (see FIG. 10). ) Is preferably within the following range.
  • L1 / which is the ratio of L1 to L5.
  • the L5 is preferably 0.3 or more, more preferably 0.5 or more.
  • the length L1 (see FIG. 10) of the central region 41 in the longitudinal direction X is preferably 60 mm or more, more preferably 100 mm or more, preferably 550 mm or less, more preferably 500 mm or less, and preferably 75 mm or more. It is 550 mm or less, more preferably 100 mm or more and 500 mm or less.
  • the length L5 of the absorbent core 40c in the longitudinal direction X is preferably 250 m or more, more preferably 300 mm or more, provided that it is longer than the length L1 of the central region 41 in the longitudinal direction X. Further, it is preferably 800 mm or less, more preferably 700 mm or less, preferably 250 mm or more and 800 mm or less, and more preferably 300 mm or more and 700 mm or less.
  • the central region 41 and the side region 43 may be formed by different layer structures of the absorbent core.
  • the absorbent core 40 has a laminated structure in which layers made of an absorbent material are laminated, and the layer forming the central region 41 forms the side region 43. It may be less than a layer.
  • Such a laminated structure is preferable in that the central region 41 and the side region 43 can be easily formed.
  • the absorbent core 40 having a laminated structure for example, the absorbent cores 40a and 40b shown in FIGS. 11A and 11B have a two-layer structure a and b in the side region 43.
  • the central region 41 shown in FIG. 11 (a) has a single-layer structure, and the central region 41 shown in FIG. 11 (b) is a non-stacked portion and does not have a layer structure. ..
  • the absorbent material which is the main component of the absorbent core 40 those used as the material of the absorbent body in this kind of absorbent article can be used without particular limitation.
  • wood pulp and hydrophilized synthetic fiber can be used.
  • Water-absorbent polymer and the like As a typical form of the absorbent core, a fiber aggregate of hydrophilic fibers such as wood pulp, or a fiber aggregate in which a particulate water-absorbing polymer is retained can be exemplified.
  • the core wrap sheet 48 covers the entire skin-facing surface and non-skin-facing surface of the absorbent core.
  • the core wrap sheet 48 may be one continuous sheet, and the one skin-side core wrap sheet covering the skin-facing surface of the absorbent core 40 and the skin-side core wrap sheet are separate from each other. It may be configured to include one non-skin side core wrap sheet that covers the non-skin facing surface of the absorbent core 40.
  • a liquid permeable sheet such as paper, various non-woven fabrics, and perforated films can be used.
  • the absorbent core and the core wrap sheet may be bonded by a known bonding means such as a hot melt type adhesive.
  • non-woven fabrics produced by various manufacturing methods can be used. Alternatively, these laminated non-woven fabrics and the like can be mentioned.
  • Examples of the elastic members 11a, 11b, 61, 55, 56, 57 described above include synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubbers, EVAs, elastic polyolefins, and polyurethanes. can.
  • synthetic rubbers such as styrene-butadiene, butadiene, isoprene, and neoprene, natural rubbers, EVAs, elastic polyolefins, and polyurethanes.
  • the exterior body 5 is an hourglass-shaped disposable diaper in which the outer body 5 is continuous over the ventral side A, the crotch part C, and the dorsal side B.
  • the exterior body 5 may be a split-type pants-type disposable diaper that is divided into a ventral exterior body, a dorsal exterior body, and an inseam exterior body as separate members.
  • the disposable diaper of the present invention is not limited to the pants-type disposable diaper, and may be a deployable disposable diaper. Further, the disposable diaper of the present invention may be a disposable diaper for infants or adults.
  • the diaper 1 includes an elastic member 61 for forming a leak-proof cuff and elastic members 11a and 11b arranged outside the width direction Y of the absorber 4, but these elastic members 61 are provided. , 11a, 11b, any one of them, or two or more of them may be provided.
  • the central region 41 in the above-described embodiment has the same width in the longitudinal direction X, it may have a different width in the same direction X.
  • the layer forming the central region 41 and the layer on the non-skin facing surface side in the side region 43 were continuous, but the layer forming the central region 41 and the layer forming the central region 41.
  • the layer on the non-skin facing surface side in the side region 43 may be formed of layers that are separate from each other.
  • the leak-proof cuff 6 is formed by folding the leak-proof cuff forming sheet 62 in half, but the leak-proof cuff is provided only in the portion where the leak-proof cuff forming elastic member 61 is fixed.
  • the leak-proof cuff forming sheet 62 may be folded back and may be composed of one sheet in other parts.
  • the invention further discloses the following disposable diapers.
  • ⁇ 1> It comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the absorber including an absorbent core, and a longitudinal direction and a width direction orthogonal to the longitudinal direction.
  • the ventral portion arranged on the ventral side of the wearer, the dorsal portion arranged on the dorsal side, and the crotch portion located between the ventral portion and the dorsal portion when worn. It ’s a disposable diaper that you have.
  • the absorber is located on both sides of the central absorber extending in the longitudinal direction and the width direction of the central absorber, and a pair of sides standing up from the skin facing surface side of the central absorber in a worn state.
  • the absorbent core has a central region in the central absorber and a side region in the side absorber, and the basis weight of the central region is smaller than the basis weight of the side region.
  • 160 g of artificial urine is injected into the disposable diaper at an injection point 7 cm away from the central position in the longitudinal direction and the center in the width direction to the ventral side in the longitudinal direction, and the diaper is allowed to stand for 5 minutes.
  • the absorbent core In the reference swelling state, the absorbent core has a side region wider and thicker than the central region.
  • a disposable diaper in which 1/2 of the width of the central region is smaller than the thickness of each of the side regions in the reference swollen state.
  • the test piece obtained by bending the disposable diaper along the longitudinal direction so as to divide the width of the disposable diaper into two equal parts is compressed until the thickness of the test piece at the inseam becomes 30 mm.
  • the disposable diaper according to ⁇ 1> above, wherein the compression load when the diaper is made is 7 N or less, preferably 0.1 N or more and 7 N or less, more preferably 1 N or more and 6.5 N or less.
  • at least one of the pair of side absorbers has a compressive load of 4.5 N or less, preferably 0.1 N or more and 4.5 N or less when compressed to a thickness of 10 mm.
  • the disposable diaper according to ⁇ 1> or ⁇ 2> preferably 0.5N or more and 4N or less.
  • ⁇ 4> In the reference swelling state, when the absorber is bent along the longitudinal direction so as to divide the width of the absorber into two equal parts, the thickness of the absorber at the lower crotch is 60 mm or less, preferably 20 mm or more.
  • ⁇ 5> In the reference swelling state, when the width of the central region is W1 and the width of the side region is W2, W2 / W1 which is the ratio of W2 to W1 is 1.1 or more and 7 or less, preferably 1.5 or more.
  • ⁇ 6> The disposable diaper according to any one of ⁇ 1> to ⁇ 5>, wherein the width of the central region is 5 mm or more and 35 mm or less, preferably 10 mm or more and 30 mm or less in the reference swollen state.
  • ⁇ 7> The disposable diaper according to any one of ⁇ 1> to ⁇ 6>, wherein the width of the side region is 35 mm or more and 60 mm or less, preferably 40 mm or more and 55 mm or less in the reference swollen state.
  • ⁇ 8> The disposable diaper according to any one of ⁇ 1> to ⁇ 7>, wherein the absorbent core has a two-layer structure in the side region.
  • ⁇ 9> The disposable diaper according to any one of ⁇ 1> to ⁇ 8>, wherein the thickness of the central region is 0.5 mm or more and 15 mm or less, preferably 1 mm or more and 10 mm or less in the reference swollen state.
  • ⁇ 10> The disposable diaper according to any one of ⁇ 1> to ⁇ 9>, wherein the thickness of the side region is 10 mm or more and 30 mm or less, preferably 15 mm or more and 25 mm or less in the reference swollen state.
  • ⁇ 11> When the thickness of the central region is t2 and the thickness of the side region is t3, t3 / t2, which is the ratio of t3 to t2, is 1.3 or more and 40 or less, preferably 2 or more and 30 or less.
  • ⁇ 12> In the reference swelling state, when 1/2 of the width W1 of the central region is Wa and the thickness of the side region is t3, t3 / Wa, which is the ratio of t3 to Wa, is 1.01 or more and 3 or less.
  • the disposable diaper according to any one of ⁇ 1> to ⁇ 11> preferably 1.1 or more and 2.5 or less.
  • ⁇ 13> The disposable diaper according to any one of ⁇ 1> to ⁇ 12>, wherein the side region is thicker than the central region in a state before the absorbent core absorbs the liquid.
  • ⁇ 14> In the state before the absorbent core absorbs the liquid, when the thickness of the central region is t2'and the thickness of the side region 43 is t3', the ratio of t3'to t2' is t3'/ t2.
  • B2 / B1 which is the ratio of B2 to B1
  • B1 is 1 or more and 700 or less, preferably 1.1 or more and 700 or less, more preferably.
  • the absorbent core has a constricted portion on the ventral side of the center in the longitudinal direction and whose side edges along the longitudinal direction are constricted inward in the width direction.
  • the disposable diaper according to any one of 1. ⁇ 19> The disposable according to any one of ⁇ 1> to ⁇ 18>, wherein the central region extends over the entire length of the side region in the longitudinal direction and has the same width in the longitudinal direction. Diapers.
  • ⁇ 20> It has a longitudinal direction and a width direction orthogonal to the longitudinal direction.
  • the surface sheet and the absorbent body having the absorber are provided with a pair of leak-proof cuffs on both sides along the longitudinal direction.
  • It comprises a front surface sheet, a back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet, the absorber including an absorbent core, and a longitudinal direction and a width direction orthogonal to the longitudinal direction.
  • the ventral portion arranged on the ventral side of the wearer, the dorsal portion arranged on the dorsal side, and the crotch portion located between the ventral portion and the dorsal portion when worn. It ’s a disposable diaper that you have.
  • the absorber is located on both sides of the central absorber extending in the longitudinal direction and the width direction of the central absorber, and a pair of sides standing up from the skin facing surface side of the central absorber in a worn state.
  • the central absorber has a non-stacked portion in which the material forming the absorbent core is absent.
  • 160 g of artificial urine is injected into the disposable diaper at an injection point 7 cm away from the central position in the longitudinal direction and the center in the width direction to the ventral side in the longitudinal direction, and the diaper is allowed to stand for 5 minutes.
  • the side absorber has a longer width and a larger thickness than the central absorber.
  • a disposable diaper in which 1/2 of the width of the central absorber is smaller than the thickness of each of the side absorbers in the reference swelling state.
  • the absorbent core absorbs the liquid and swells, the movement around the thigh of the wearer is not easily restricted, and walking can be easily performed.

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

Abstract

Couche (1) équipée d'une feuille supérieure (2), d'une feuille arrière (3) et d'un corps absorbant (4) qui est placé entre les feuilles. Le corps absorbant (4) présente, dans une partie d'entrejambe (C), un corps absorbant central (41) s'étendant dans la direction longitudinale de celui-ci, et une paire de corps absorbants latéraux (4S, 4S) qui sont positionnés sur les deux côtés dans la direction de la largeur de l'absorbant central et élèvent depuis le côté faisant face à la peau du corps absorbant central dans un état usé. Le corps absorbant (4) présente un noyau absorbant (40) qui présente une région centrale (41) dans le corps absorbant central (4C) et comporte des régions latérales (44) dans les corps absorbants latéraux (4S). La région centrale (41) présente un grammage supérieur à celui de la seconde latérale (43). Dans le noyau absorbant (41) dans un état de gonflement de référence, les régions latérales (43) sont plus larges et plus épaisses que la région centrale (41). Dans l'état de gonflement de référence, la demi-largeur de la région centrale (41) est inférieure à l'épaisseur de chaque région latérale (43).
PCT/JP2020/020020 2020-05-20 2020-05-20 Couche jetable WO2021234880A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012198A (ja) * 2006-07-07 2008-01-24 Uni Charm Corp 使い捨ておむつ
JP2011177308A (ja) * 2010-02-27 2011-09-15 Unicharm Corp 使い捨て着用物品
JP2011177310A (ja) * 2010-02-27 2011-09-15 Unicharm Corp 使い捨て着用物品
JP2012090818A (ja) * 2010-10-27 2012-05-17 Oji Nepia Co Ltd 吸収性物品
JP2016501669A (ja) * 2012-12-27 2016-01-21 エスセーアー・ハイジーン・プロダクツ・アーベー 使用中の制御された変形を呈する吸収性コアおよび吸収性コアを備える吸収性物品
JP2016049247A (ja) * 2014-08-29 2016-04-11 大王製紙株式会社 吸収性物品

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008012198A (ja) * 2006-07-07 2008-01-24 Uni Charm Corp 使い捨ておむつ
JP2011177308A (ja) * 2010-02-27 2011-09-15 Unicharm Corp 使い捨て着用物品
JP2011177310A (ja) * 2010-02-27 2011-09-15 Unicharm Corp 使い捨て着用物品
JP2012090818A (ja) * 2010-10-27 2012-05-17 Oji Nepia Co Ltd 吸収性物品
JP2016501669A (ja) * 2012-12-27 2016-01-21 エスセーアー・ハイジーン・プロダクツ・アーベー 使用中の制御された変形を呈する吸収性コアおよび吸収性コアを備える吸収性物品
JP2016049247A (ja) * 2014-08-29 2016-04-11 大王製紙株式会社 吸収性物品

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