WO2023112760A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2023112760A1 WO2023112760A1 PCT/JP2022/044787 JP2022044787W WO2023112760A1 WO 2023112760 A1 WO2023112760 A1 WO 2023112760A1 JP 2022044787 W JP2022044787 W JP 2022044787W WO 2023112760 A1 WO2023112760 A1 WO 2023112760A1
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- WO
- WIPO (PCT)
- Prior art keywords
- absorbent
- embossed
- skin
- superabsorbent polymer
- absorbent article
- Prior art date
- Legal status (The legal status 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 status listed.)
- Ceased
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Classifications
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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
- A61F13/53—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
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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
- A61F13/53—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
- 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
- A61F13/534—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 an inhomogeneous composition through the thickness 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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
-
- 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
- A61F13/534—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 an inhomogeneous composition through the thickness of the pad
- A61F13/535—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
- A61F13/536—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 an inhomogeneous composition through the thickness of the pad inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes having discontinuous areas of compression
Definitions
- the present disclosure relates to absorbent articles.
- Absorbent articles such as disposable diapers and sanitary napkins are widely used.
- This type of absorbent article comprises an absorbent body containing a superabsorbent polymer that absorbs body fluids of the wearer, such as urine and blood.
- a superabsorbent polymer that absorbs body fluids of the wearer, such as urine and blood.
- absorbent articles having an absorbent body for example, absorbent articles described in Patent Documents 1 to 3 below are known.
- Patent Document 1 describes an infant diaper that includes a topsheet, a backsheet, and an absorbent pad disposed between the topsheet and the backsheet.
- the absorbent pad includes a first nonwoven layer, a second nonwoven layer, and an absorbent core disposed between the first and second nonwoven layers and comprising a superabsorbent polymer (SAP).
- SAP superabsorbent polymer
- the absorbent pad is formed with a grid-like seal connecting the first nonwoven layer and the second nonwoven layer to partition the absorbent pad into a plurality of cells. The absorbency of the cells located in the central longitudinal zone of the plurality of cells is increased relative to the absorbency of the other cells.
- Patent Document 2 discloses a top sheet, a back sheet, an absorbent body disposed between the top sheet and the back sheet, an acquisition layer disposed between the top sheet and the absorbent body, and an absorbent body and the acquisition layer.
- a diaper is described that includes a distribution layer disposed therebetween.
- the absorbent body is formed with a pair of channels that are substantially or completely free of superabsorbent polymer.
- Patent Document 3 describes a pants-type diaper comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body arranged between the liquid-permeable sheet and the liquid-impermeable sheet.
- the absorbent body includes a first absorbent layer, a second absorbent layer, and an intermediate layer disposed between the first absorbent layer and the second absorbent layer.
- a pair of longitudinally extending channels are formed in the second absorbent layer.
- the basis weight of the superabsorbent polymer present in the pair of channels is lower than in the rest of the second absorbent layer.
- a superabsorbent polymer having a uniform basis weight is arranged in the portions of the first absorbent layer and the second absorbent layer excluding the pair of channels.
- an object of the present disclosure is to provide an absorbent article capable of suppressing leakage of bodily fluids.
- an absorbent article that has a longitudinal direction connecting the wearer's ventral side and a dorsal side, and a width direction orthogonal to the longitudinal direction.
- This absorbent article includes an absorbent body containing a superabsorbent polymer and having a plurality of absorbent regions arranged two-dimensionally when viewed from the wearer's skin side.
- Each of the plurality of absorbent regions includes a central region and a peripheral region arranged to surround the central region, and the density of the superabsorbent polymer present in the peripheral region is the density of the superabsorbent polymer present in the central region. Higher than density.
- the water absorption rate in the central region is higher than that in the peripheral region.
- the superabsorbent polymer is present in the peripheral region at a relatively high density, the maximum water absorption of the peripheral region is greater than the maximum water absorption of the central region.
- body fluid discharged from the wearer is absorbed in the central region at a high absorption rate and diffused in the thickness direction of the absorbent body. A part of the body fluid absorbed in the central region moves to the peripheral region where the maximum water absorption is large and is absorbed.
- the superabsorbent polymer swells and the water permeability decreases as the water absorption amount increases, when a large amount of body fluid is absorbed in the peripheral region, the water permeability of the peripheral region decreases, and eventually the water permeability around the central region A barrier with low permeability is formed.
- a barrier is formed around the central region, bodily fluid discharged from the wearer and flowing in the longitudinal direction is blocked by the low permeability barrier and changes its flow direction. Then, the body fluid whose direction of flow has changed is absorbed by another absorbent area.
- the body fluid can be diffused over a wide area, so that the absorbent body can efficiently absorb the body fluid. Therefore, leakage of bodily fluids can be suppressed.
- the plurality of absorbent regions may be arranged along a direction crossing the longitudinal direction.
- arranging a plurality of absorbent regions in a direction crossing the longitudinal direction it is possible to diffuse the body fluid flowing in the longitudinal direction in the width direction. Therefore, leakage of bodily fluids from the ends in the longitudinal direction of the absorber can be suppressed.
- the plurality of absorbent regions may be arranged two-dimensionally along the longitudinal direction and the width direction.
- the body fluid can be diffused in the longitudinal direction and the width direction, so that the absorbent body can efficiently absorb the body fluid.
- At least part of the plurality of absorbent regions may protrude toward the skin surface.
- a gap is formed on the non-skin surface side of the absorbent body by partially protruding the plurality of absorbent regions to the skin surface side. Leakage of the body fluid is suppressed by storing the body fluid that has not been absorbed in the absorbent area in the gap.
- the absorbent body includes a non-skin side embossed portion including a surface concave portion recessed toward the non-skin side of the wearer and a back convex portion protruding toward the non-skin side of the wearer, and the non-skin side embossed portion includes , may be formed so as to surround each of the plurality of absorption regions.
- the body fluid can be effectively diffused by flowing along the surface concave portion of the non-skin embossed portion.
- the non-skin side embossed portions may be intermittently formed when viewed from the skin side.
- bodily fluids can pass through between the non-skin side embossed portions, thereby promoting the diffusion of bodily fluids.
- At least part of the plurality of absorbent regions may protrude to the non-skin side of the wearer. At least a part of the plurality of absorbent regions protrudes to the non-skin surface side, thereby forming voids on the skin surface side of the absorbent body, and bodily fluids of the wearer are stored in the voids. Body fluid accumulated in the voids permeates the absorbent body and is diffused in the thickness direction. Therefore, it is possible to allow the absorbent body to efficiently absorb body fluids.
- the absorbent body includes a skin-side embossed portion including a surface convex portion protruding toward the wearer's skin and a back concave portion recessed toward the skin side, and the skin-side embossed portion includes a plurality of absorbers. It may be formed so as to surround each of the regions. In this aspect, each of the plurality of absorbent regions is surrounded by the skin surface side embossed portion like a weir, so body fluid can be reliably absorbed in the plurality of absorbent regions.
- the skin side embossed portion may be intermittently formed when viewed from the skin side.
- bodily fluids can pass through between the skin-side embossed portions, thereby promoting diffusion of bodily fluids.
- the density of the superabsorbent polymer present in the peripheral region may be 10% or more higher than the density of the superabsorbent polymer present in the central region.
- the plurality of absorbent regions may be defined by a grid pattern. Defining a plurality of absorbent regions by the lattice pattern allows the body fluid to be diffused throughout the absorbent body, allowing the absorbent body to efficiently absorb the body fluid.
- the absorbent body may include non-squeezed portions that are arranged at positions corresponding to grid points of a grid pattern and are not embossed.
- the non-squeezed portions By forming the non-squeezed portions at positions corresponding to the grid points of the grid pattern, the flow of body fluids along the non-skin-side embossed portions is partially blocked, thereby facilitating permeation of the body fluids into the absorbent body. Become. Therefore, leakage of bodily fluids can be suppressed.
- the absorbent body further includes a pair of longitudinally extending channel portions, and the density of the superabsorbent polymer contained in the pair of channel portions is equal to that of the superabsorbent polymer contained in the other portion of the absorbent body. may be lower than the density of The pair of channel portions quickly absorbs body fluids of the wearer and diffuses them in the longitudinal direction and the width direction of the absorbent article. Therefore, it is possible to allow the absorbent body to efficiently absorb body fluids.
- the density of the superabsorbent polymer present in the peripheral region within the pair of channel portions may be 50% or more higher than the density of the superabsorbent polymer present in the central region within the pair of channel portions.
- the absorbent body has a ventral portion located at one longitudinal end, a dorsal portion located at the other longitudinal end, and an intermediate portion located between the ventral portion and the dorsal portion.
- At least one of the abdominal portion and the dorsal portion may include an end embossed portion extending between both ends in the width direction of the absorbent body.
- the end embossed portion formed on at least one of the ventral portion and the dorsal portion blocks the longitudinal flow of urine reaching the ventral portion or the dorsal portion. It is possible to suppress urine leakage from the end of the.
- the average thickness of the ventral portion and the dorsal portion may be smaller than the average thickness of the intermediate portion.
- the absorbent body further includes a non-absorbent region that does not contain a superabsorbent polymer, and the non-absorbent region is located on one end side in the longitudinal direction of the absorbent body from the boundary between the abdominal side portion and the intermediate portion, or on the back side of the absorbent body. It may be arranged on the other end side in the longitudinal direction of the absorber from the boundary between the side portion and the intermediate portion.
- the ventral part and the dorsal part are less likely to swell when body fluids permeate the absorbent body, the components of the ventral part and the dorsal part are less likely to be damaged.
- the absorbent body includes a first absorbent layer located on the wearer's skin side, a second absorbent layer located on the wearer's non-skin side, and a combination of the first absorbent layer and the second absorbent layer.
- the first absorbent layer, the second absorbent layer and the intermediate layer may comprise a superabsorbent polymer.
- body fluid can be dispersed and retained in the thickness direction of the absorbent body.
- the density of the superabsorbent polymer present in the intermediate layer of the central region may be higher than the density of the superabsorbent polymer present in the intermediate layer of the peripheral region.
- by increasing the density of the water-absorbent polymer in the middle layer of the central region it is possible to diffuse the body fluid to the peripheral region while reducing body fluid that migrates to the second absorbent layer of the central region.
- body fluid leakage can be suppressed.
- FIG. 1 is a perspective view schematically showing an absorbent article according to one embodiment
- FIG. 1 is a plan view of an absorbent article viewed from the skin surface side
- FIG. Fig. 2 is a plan view of the absorbent article viewed from the non-skin surface side
- FIG. 3 is a cross-sectional view of the absorbent article taken along line IV-IV of FIG. 2
- Fig. 2 is a plan view of the absorbent body viewed from the skin surface side
- Fig. 3 is a plan view of the absorbent body viewed from the non-skin surface side
- FIG. 6 is a cross-sectional view of the absorber along line VII-VII in FIG. 5; It is a top view which expands and shows a part of absorber. It is a top view which shows the modification of an absorber. It is a sectional view showing a modification of an absorber. It is a figure which shows roughly the modification of a 2nd embossing part.
- FIG. 1 is a perspective view of an absorbent article 1 according to one embodiment.
- 2 is a plan view of the absorbent article 1 viewed from the skin side Z1
- FIG. 3 is a plan view of the absorbent article 1 viewed from the non-skin side Z2.
- FIG. 4 is a cross-sectional view of the absorbent article 1 taken along line IV-IV of FIG.
- the absorbent article 1 shown in FIGS. 1-4 is a pants-type disposable diaper that absorbs the wearer's urine.
- the absorbent article 1 is not limited to a pants-type disposable diaper, and may be a tape-type disposable diaper, a pet disposable diaper, toilet training pants, a sanitary napkin, or the like.
- the absorbent article 1 is cut at the side ends 34 of the ventral waist portion 3 and the side ends 44 of the dorsal waist portion 4, which will be described later, and the absorbent article 1 is cut to a state where no wrinkles are formed.
- 1 shows the absorbent article 1 in a stretched state with 1 unfolded.
- the skin side Z1 is the side facing the wearer's skin when the absorbent article 1 is in use (wearing state)
- the non-skin side Z2 is the use state (wearing state) of the absorbent article 1. This is the side facing away from the wearer's skin when .
- a wearer is a subject who wears the absorbent article 1 . In the following description, the positional relationship in the extended state will be described unless otherwise specified.
- the absorbent article 1 extends in the width direction X and the longitudinal direction Y in the stretched state.
- the longitudinal direction Y is the direction extending between the abdomen and the back of the wearer when the absorbent article 1 is worn.
- the width direction X is a direction orthogonal to the longitudinal direction Y, and is a direction extending in the lateral direction of the wearer when the absorbent article 1 is worn.
- the thickness direction Z is a direction perpendicular to the width direction X and the longitudinal direction Y.
- one end side of the absorbent article 1 in the longitudinal direction Y may be referred to as the ventral side, and the other end side in the longitudinal direction Y may be referred to as the dorsal side.
- the absorbent article 1 includes a ventral waist portion 3, a back waist portion 4, and a body portion 10.
- the body portion 10 has a substantially rectangular planar shape elongated in the longitudinal direction Y of the absorbent article 1 .
- the main body 10 includes a ventral end 10a arranged at one end in the longitudinal direction Y, a dorsal end 10b arranged at the other end in the longitudinal direction Y, It includes a crotch portion 10c arranged in the longitudinal direction Y between the ventral end 10a and the dorsal end 10b.
- the ventral waist portion 3 is joined to the ventral side end portion 10a of the main body portion 10 from the non-skin surface side Z2.
- the back side waist portion 4 is joined to the back side end portion 10b of the body portion 10 from the non-skin side Z2.
- the main body portion 10 is folded in half so that the abdominal waist portion 3 and the back waist portion 4 face each other, and the side end portion 34 in the width direction X of the abdomen waist portion 3 and the back waist portion are separated.
- the ventral waist portion 3 and the back waist portion 4 are connected in a belt shape.
- the absorbent article 1 is formed into a pants type.
- the pants-type absorbent article 1 is formed with a waist opening BH through which the wearer's torso is passed, and a pair of leg openings LH through which the wearer's legs are passed.
- the abdominal waist portion 3 has a substantially rectangular planar shape whose longitudinal direction is the width direction X of the absorbent article 1, and is arranged on the non-skin surface side Z2 relative to the abdominal end portion 10a of the main body portion 10. ing.
- the abdominal waist portion 3 includes a skin sheet 31 arranged on the skin side Z1, a non-skin sheet 32 arranged on the non-skin side Z2, and a plurality of elastic members (second elastic members) 33. contains.
- the skin sheet 31 and the non-skin sheet 32 are, for example, an SMS nonwoven fabric, a spunbond nonwoven fabric, an air-through nonwoven fabric, a plastic sheet, a perforated plastic sheet, or a laminate of these nonwoven fabrics, in which spunbond, meltblown and spunbond are laminated in this order. etc.
- the skin sheet 31 and the non-skin sheet 32 are joined together with an adhesive such as hot melt.
- a plurality of stretchable members 33 are arranged at intervals in the longitudinal direction Y between the skin sheet 31 and the non-skin sheet 32 .
- the plurality of stretchable members 33 extend between side ends 34 in the width direction X of the ventral waist portion 3 . Therefore, the ventral waist portion 3 expands and contracts in the width direction X while fitting to the wearer's waist.
- the elastic member 33 is made of an elastic material such as rubber or spandex. As shown in FIG. 2, at least some of the plurality of stretchable members 33 extend across the width direction X of the absorber 13, which will be described later, when viewed from the skin surface side Z1.
- the dorsal waist portion 4 has a substantially rectangular planar shape elongated in the width direction X of the absorbent article 1 and is arranged on the non-skin surface side Z2 from the dorsal end portion 10b of the main body portion 10 .
- the back waist portion 4 includes a skin sheet 41 arranged on the skin side Z1, a non-skin sheet 42 arranged on the non-skin side Z2, and a plurality of elastic members (second elastic members) 43. contains.
- the skin sheet 41 and the non-skin sheet 42 are, for example, an SMS nonwoven fabric, a spunbond nonwoven fabric, an air-through nonwoven fabric, a plastic sheet, a perforated plastic sheet, or a laminate of these nonwoven fabrics, in which spunbond, meltblown and spunbond are laminated in order. etc.
- the skin sheet 41 and the non-skin sheet 42 are joined together with an adhesive such as hot melt.
- a plurality of stretchable members 43 are arranged at intervals in the longitudinal direction Y between the skin sheet 41 and the non-skin sheet 42 .
- the plurality of stretchable members 43 extend between side ends 44 in the width direction X of the back waist portion 4 . Therefore, the back side waist part 4 expands and contracts in the width direction X while fitting to the wearer's waist.
- the elastic member 43 is made of an elastic material such as rubber or spandex. As shown in FIG. 2, at least some of the plurality of stretchable members 43 extend across the width direction X of the absorber 13, which will be described later, when viewed from the skin surface side Z1.
- the body portion 10 includes a top sheet 11, a back sheet 12 and an absorbent body 13.
- the top sheet 11 constitutes the surface of the body portion 10 that is brought into contact with the wearer, and is arranged on the skin surface side Z1.
- the top sheet 11 includes a center sheet 11a covering the absorber 13 and side sheets 11b covering both sides in the width direction X of the center sheet 11a.
- the center sheet 11a is made of, for example, a water-permeable nonwoven fabric such as a spunbond nonwoven fabric.
- the side sheet 11b is made of, for example, a water-impermeable nonwoven fabric. Both ends of the side sheet 11b in the longitudinal direction Y are joined to the center sheet 11a with a hot-melt adhesive or the like.
- Leakage prevention gathers 80 are formed on the side sheet 11b. Leakage-preventing gathers 80 are arranged outside in the width direction X of the absorbent body 13 and suppress leakage of urine excreted into the absorbent body 13 in the width direction X. As shown in FIG. In one embodiment, the leak-proof gathers 80 include a pair of stretchable members (first stretchable members) 71 extending in the longitudinal direction Y, a standing portion 81 standing by contraction of the pair of stretchable members 71, and It includes a horizontal fixing portion 82 that serves as an erecting fulcrum of the erecting portion 81 and a vertical fixing portion 83 that serves as an erecting fulcrum of the erecting portion 81 in the longitudinal direction Y. As shown in FIG.
- a pair of elastic members 71 are provided in the inner portion of the side seat 11b in the width direction X and extend in the longitudinal direction Y.
- the pair of elastic members 71 is, for example, thread rubber or flat rubber that can contract in the length direction.
- the pair of stretchable members 71 are spaced apart from each other across the center line CL in the width direction X of the main body 10, and are fixed to the side seat 11b while being stretched in the longitudinal direction Y.
- the ventral ends of the pair of stretchable members 71 are arranged at the ventral end 10a, and the dorsal ends of the pair of stretchable members 71 are arranged at the dorsal end 10b.
- the pair of elastic members 71 are arranged on the non-skin surface side Z2 of the absorbent body 13 .
- the lateral fixing portion 82 is formed in substantially the entire longitudinal direction Y of the main body portion 10 at a position outside the standing portion 81 in the width direction X of the side seat 11b.
- the lateral fixed portion 82 is a part of the side seat 11b and is fixed to the center seat 11a.
- the lateral fixing portion 82 serves as a standing fulcrum of the standing portion 81 in the width direction X. As shown in FIG.
- the vertical fixing part 83 is formed on the ventral side end part 10a and the dorsal side end part 10b at positions inside the horizontal fixing part 82 in the width direction X.
- the vertical fixed portion 83 is a part of the side seat 11b and is fixed to the center seat 11a.
- the vertical fixed portion 83 serves as an upright fulcrum of the upright portion 81 in the longitudinal direction Y. As shown in FIG.
- the standing portion 81 is formed between vertical fixing portions 83 respectively formed on the abdominal end portion 10a and the dorsal end portion 10b. That is, the upright portion 81 is arranged at a position inside the lateral fixing portion 82 in the width direction X and inside the longitudinal fixing portion 83 in the longitudinal direction Y. As shown in FIG.
- the standing portion 81 is a portion of the side seat 11b that is not fixed to the center seat 11a.
- An elastic member 71 elongated in the longitudinal direction Y is connected to the standing portion 81 .
- the expandable member 71 contracts in the longitudinal direction Y
- the body portion 10 is deformed in the closing direction, and the standing portion 81 rises with the horizontal fixing portion 82 as a starting point. Urinary leakage is prevented by standing upright portions 81 at positions sandwiching absorbent body 13 in the width direction X in this way.
- a pair of elastic members 72 extending in the longitudinal direction Y are provided on the outer side portion in the width direction X of the side seat 11b. As shown in FIG. 2 , the pair of elastic members 72 are arranged outside the pair of elastic members 71 in the width direction X. As shown in FIG.
- the pair of stretchable members 72 are, for example, thread rubber or flat rubber that can be contracted in the length direction, and are fixed to the side seat 11b while being stretched in the longitudinal direction Y. As shown in FIG. As described above, the pair of stretchable members 72 are fixed to the side seat 11b in a state of being stretched in the longitudinal direction Y, thereby applying force to deform the main body 10 in the closing direction.
- the pair of stretchable members 72 are arranged on the non-skin surface side Z2 of the absorbent body 13, and are arranged along the side edges of the main body 10 between the top sheet 11 and the back sheet 12 of the main body 10. .
- the pair of elastic members 72 may extend in the longitudinal direction Y while being sewn to the top sheet 11 and the back sheet 12 of the main body 10 .
- a cushion sheet 22 may be provided between the top sheet 11 and the absorbent body 13 as shown in FIG.
- the cushion sheet 22 is made of, for example, a nonwoven fabric having higher rigidity than the top sheet 11 .
- the cushion sheet 22 is bonded to the top sheet 11 and the surface 14 of the absorbent body 13 with an adhesive such as hot melt.
- At least part of the cushion seat 22 may have a tapered shape that shrinks in the width direction X as it approaches the end in the longitudinal direction Y.
- the cushion seat 22 is arranged in the crotch portion 10c of the main body portion 10, and the width in the width direction X of the cushion seat 22 is reduced as it approaches the dorsal end portion 10b. Since the cushion sheet 22 has such a shape, the top sheet 11 arranged on the cushion sheet 22 is wrinkled, and a gap is formed between the top sheet 11 and the absorbent body 13 .
- the air permeability of the absorbent article 1 is improved by allowing air to flow through the voids.
- the top sheet 11 may be formed with a plurality of ventilation holes 74 penetrating through the top sheet 11 in the thickness direction.
- a plurality of ventilation holes 74 are two-dimensionally formed in the top sheet 11 when viewed from the skin surface side Z1.
- at least one or more vent holes 74 out of the plurality of vent holes 74 overlap at least one of the first embossed portion 16 and the second embossed portion 18 of the absorber 13, which will be described later. may be placed.
- the back sheet 12 constitutes a surface positioned on the outer side of the body portion 10 when worn, and is arranged on the non-skin surface side Z2.
- the back sheet 12 includes a water-impermeable back film 12a and a back non-woven fabric 12b arranged on the non-skin surface side Z2 of the back film 12a.
- the width of the back film 12a in the width direction X may be smaller than the width of the back nonwoven fabric 12b in the width direction X, and the back nonwoven fabric 12b may extend to both sides in the width direction X beyond the back film 12a.
- the absorber 13 is arranged between the top sheet 11 and the back sheet 12 of the body part 10 and absorbs the wearer's urine that permeates through the top sheet 11 .
- 5 is a plan view of the absorbent body 13 seen from the skin side Z1
- FIG. 6 is a plan view of the absorbent body 13 seen from the non-skin side Z2.
- FIG. 7 is a cross-sectional view of absorbent body 13 taken along line VII-VII in FIG.
- the absorbent body 13 has a substantially rectangular shape elongated in the longitudinal direction Y when viewed from the skin surface side Z1, and the width of the absorbent body 13 in the width direction X is equal to It is formed shorter than the width in X.
- the absorber 13 is arranged substantially in the center of the body portion 10 in the width direction X. As shown in FIG. The ventral end of the absorber 13 is arranged at the ventral end 10a of the main body 10, and the dorsal end of the absorber 13 is arranged at the dorsal end 10b of the main body 10 ( See Figure 2).
- the absorbent body 13 has a front surface 14 arranged on the wearer's skin side Z1 and a back surface 15 arranged on the wearer's non-skin side Z2.
- the absorbent body 13 is embossed from the skin surface side Z1 and the non-skin surface side Z2. Concavo-convex shapes formed on the front surface 14 and the back surface 15 of the absorber 13 will be described later.
- the absorbent body 13 includes a core portion 13a and a core wrap 13b.
- the core portion 13a includes, for example, plant-derived pulp fibers and a super absorbent polymer (SAP), and has water absorbency.
- the core wrap 13b is made of, for example, a tissue or a non-woven fabric sheet, and covers the skin side Z1 and the non-skin side Z2 of the core portion 13a.
- the core wrap 13b is adhered to the surface of the core portion 13a with, for example, a hot melt adhesive.
- the area of the core wrap 13b bonded to the core portion 13a may be larger than the area of the core wrap 13b not bonded to the core portion 13a.
- the core wrap 13b is joined to the core portion 13a so as to follow the uneven surface shape of the core portion 13a.
- the skin surface side Z1 and the non-skin surface side Z2 of the core wrap 13b constitute the front surface 14 and the back surface 15 of the absorbent body 13, respectively.
- the absorber 13 may have a pair of channel portions 61 formed therein.
- the pair of channel portions 61 are arranged apart from each other across the center line CL of the body portion 10 and extend in the longitudinal direction Y.
- the basis weight of the channel portion 61 is set lower than the basis weight of other portions of the absorbent body 13 . Therefore, the density of the pulp fibers and superabsorbent polymer present in the pair of channel portions 61 is lower than the density of the pulp fibers and superabsorbent polymer present in other portions of the absorbent body 13 .
- Forming the pair of channel portions 61 in the absorbent body 13 facilitates the flow of urine excreted from the wearer in the longitudinal direction Y. As shown in FIG.
- the pair of channel portions 61 have the function of controlling the direction of urine flow.
- the density of the superabsorbent polymer represents the average number of superabsorbent polymers per unit area of the absorbent body 13 .
- the channel portion 61 may be a slit with zero basis weight.
- the absorbent body 13 may further have a non-absorbent region 62 that does not substantially contain the superabsorbent polymer.
- the non-absorbent region 62 is formed, for example, at least one of one end side and the other end side in the longitudinal direction Y relative to the pair of channel portions 61 .
- the basis weight of the non-absorbent region 62 is set lower than the basis weight of other portions of the absorbent body 13 excluding the pair of channel portions 61 . Therefore, the thickness of the non-absorbent region 62 is smaller than the thickness of other portions of the absorbent body 13 .
- the absorber 13 includes a plurality of first embossed portions 16 and second embossed portions (non-skin side embossed portions) 18 .
- the plurality of first embossed portions 16 are portions compressed from the non-skin surface side Z2 toward the skin surface side Z1 by embossing. As shown in FIG. 5, the plurality of first embossed portions 16 are two-dimensionally arranged when viewed from the skin surface side Z1. More specifically, as shown in FIG. 5 , the plurality of first embossed portions 16 are arranged at intervals in the width direction X and the longitudinal direction Y of the absorbent body 13 .
- the plurality of first embossed portions 16 are arranged at intervals in an oblique direction intersecting the width direction X and the longitudinal direction Y. As shown in FIG. In addition, the some 1st embossed part 16 should just be arrange
- each of the plurality of first embossed portions 16 includes a front convex portion 16a protruding toward the skin side Z1 and a rear concave portion 16b recessed toward the skin side Z1.
- the front convex portion 16a is a portion of the surface 14 of the absorbent body 13 that protrudes toward the skin side Z1
- the back concave portion 16b is a portion of the back surface 15 of the absorbent body 13 that is recessed toward the skin side Z1. That is, the front surface convex portions 16a and the rear surface concave portions 16b of the plurality of first embossed portions 16 form parts of the front surface 14 and the rear surface 15 of the absorbent body 13, respectively.
- the plurality of first embossed portions 16 are formed by, for example, using a roller formed with a plurality of convex portions having an inverted shape of the plurality of first embossed portions 16 so that the absorber 13 is placed on the non-skin surface side. Formed by squeezing from Z2. At least one of the front convex portion 16a and the rear concave portion 16b of the first embossed portion 16 may include a flat surface. In the following description, a region of the absorbent body 13 that overlaps the surface convex portion 16a in the thickness direction Z is referred to as a first embossed portion 16. As shown in FIG.
- the second embossed portion 18 includes a surface recessed portion 18a recessed on the wearer's non-skin side Z2 and a back surface convex portion 18b protruding on the non-skin side Z2.
- the surface concave portion 18a is a portion of the surface 14 of the absorbent body 13 that is recessed toward the non-skin surface side Z2
- the rear surface convex portion 18b is a portion of the rear surface 15 of the absorbent body 13 that protrudes toward the non-skin surface side Z2.
- the surface concave portion 18a and the rear surface convex portion 18b of the second embossed portion 18 form part of the front surface 14 and the rear surface 15 of the absorbent body 13, respectively.
- the second embossed portion 18 absorbs by squeezing the absorbent body 13 from the skin surface side Z1 using a roller on which a convex portion having a reverse shape of the second embossed portion 18 is formed, for example. It is a groove formed on the skin surface side Z1 of the body 13 . At least one of the surface concave portion 18a and the rear surface convex portion 18b of the second embossed portion 18 may include a flat surface. In the following description, a region of the absorbent body 13 that overlaps the rear surface convex portion 18b in the thickness direction Z is referred to as a second embossed portion 18. As shown in FIG.
- the surface convex portion 16a of the first embossed portion 16 is arranged closer to the skin surface side Z1 than the surface concave portion 18a of the second embossed portion 18.
- the rear concave portion 16b of the first embossed portion 16 is arranged closer to the skin surface side Z1 than the rear convex portion 18b of the second embossed portion 18 is.
- the back surface recessed portion 16b of the first embossed portion 16 is arranged on the non-skin surface side Z2 relative to the front surface recessed portion 18a of the second embossed portion 18.
- FIG. When viewed from the skin surface side Z1, the rear surface recessed portion 16b of the first embossed portion 16 and the front surface recessed portion 18a of the second embossed portion 18 are formed at positions shifted from each other.
- the surface protrusions 16a and the surface recesses 18a are arranged at different positions in the thickness direction Z, so that the surface 14 of the absorber 13 is uneven.
- the back concave portion 16b and the back convex portion 18b are arranged at different positions in the thickness direction Z, the back surface 15 of the absorber 13 is formed with an uneven shape. Therefore, the surface 14 of the absorbent body 13 is defined by the surface recesses 18a, and the surface voids 20 that are open to the skin surface side Z1 are formed.
- a back surface gap 21 defined by the back recess 16b and opening to the non-skin surface side Z2 is formed.
- These surface voids 20 and back voids 21 function as channels through which urine or air discharged from the wearer flows. For example, when a large amount of urine is supplied to the absorbent body 13 , urine that has not been completely absorbed by the absorbent body 13 is accumulated in the back surface gap 21 .
- the total area of the plurality of first embossed portions 16 viewed from the skin side Z1 may be larger than the area of the second embossed portions 18 viewed from the skin side Z1.
- the total area of the plurality of first embossed portions 16 corresponds to the total projected area of the surface convex portions 16a of the plurality of first embossed portions 16 viewed from the skin surface side Z1.
- the area corresponds to the projected area of the surface recessed portion 18a of the second embossed portion 18 viewed from the skin surface side Z1.
- the absorbent body 13 has a multi-layered structure including a first absorbent layer 26, a second absorbent layer 27 and an intermediate layer .
- the first absorbent layer 26 is a water absorbent layer containing a superabsorbent polymer, and is arranged on the skin surface side Z1.
- the second absorbent layer 27 is a water absorbent layer containing a super absorbent polymer, and is arranged on the non-skin surface side Z2.
- the intermediate layer 28 is arranged between the first absorbent layer 26 and the second absorbent layer 27 .
- the intermediate layer 28 may also contain the superabsorbent polymer.
- the absorbent body 13 is squeezed during the formation of the first embossed portion 16 and the second embossed portion 18 so that the first absorbent layer 26 and the second absorbent A portion of the superabsorbent polymer contained in the layer 27 migrates to the intermediate layer 28 to place the superabsorbent polymer within the intermediate layer 28 .
- the superabsorbent polymer is dispersed and arranged in the thickness direction Z of the absorbent body 13, The breathability of the body 13 is improved.
- the density of the superabsorbent polymer present in the intermediate layer 28 may be lower than the density of the superabsorbent polymer present in the first absorbent layer 26 and the second absorbent layer 27 .
- the second embossed portions 18 are formed between the plurality of first embossed portions 16 .
- the second embossed portions 18 are formed so as to surround each of the plurality of first embossed portions 16 .
- the second embossed portion 18 may be formed along a grid pattern 24 when viewed from the skin surface side Z1.
- the lattice pattern 24 includes a plurality of first imaginary lines 24a extending parallel to each other in a direction intersecting the width direction X and the longitudinal direction Y, and a plurality of first imaginary lines 24a extending in a direction intersecting the width direction X and the longitudinal direction Y parallel to each other. and a plurality of existing second virtual lines 24b.
- the plurality of first virtual lines 24 a and the plurality of second virtual lines 24 b extend in symmetrical directions with respect to the center line CL of the absorbent article 1 and cross each other to form a grid pattern 24 .
- the second embossed portions 18 may be intermittently formed along a plurality of first virtual lines 24a and a plurality of second virtual lines 24b.
- the second embossed portions 18 may be arranged in a wavy line pattern along the plurality of first virtual lines 24a and the plurality of second virtual lines 24b, or may be arranged in a dot pattern.
- non-squeezed portions 25 are formed at positions corresponding to grid points (intersections of a plurality of first virtual lines 24a and a plurality of second virtual lines 24b) of the grid pattern 24.
- the non-pressed portion 25 is a portion that is not substantially subjected to pressing such as embossing. Therefore, in the thickness direction Z, the surface 14 of the skin surface side Z1 of the non-squeezed portion 25 is arranged between the surface convex portion 16a of the first embossed portion 16 and the surface concave portion 18a of the second embossed portion 18, and is not compressed.
- the back surface 15 of the non-skin surface side Z2 of the portion 25 is arranged between the back concave portion 16b of the first embossed portion 16 and the back convex portion 18b of the second embossed portion 18 .
- a plurality of absorbent regions 30 are formed in the absorbent body 13 .
- the plurality of absorbent regions 30 are regions defined by the grid-like pattern 24, and are two-dimensionally arranged over substantially the entire area of the absorbent body 13 when viewed from the skin surface side Z1. That is, the absorbent region 30 is a region surrounded by the second embossed portions 18 .
- the plurality of absorbent regions 30 are arranged at intervals in a direction intersecting the longitudinal direction Y, for example, in the width direction X, or in an oblique direction intersecting the width direction X and the longitudinal direction Y. In the example shown in FIG.
- the plurality of absorbent regions 30 are two-dimensionally arranged in the width direction X, the longitudinal direction Y, and the diagonal direction of the absorbent body 13 .
- the maximum width in the width direction X of at least one absorbent region 30 among the plurality of absorbent regions 30 may be larger than the maximum width in the longitudinal direction Y of the absorbent region 30 .
- each of the plurality of absorbent regions 30 has a rhombic shape with long sides extending in the width direction X and short sides extending in the longitudinal direction Y. As shown in FIG.
- the absorbent region 30 may have a vertically long rhombic shape with long sides extending in the longitudinal direction Y and short sides extending in the width direction X, or may be circular, elliptical, polygonal, or the like. , may have a shape other than a rhombus.
- a plurality of first embossed portions 16 are formed inside the plurality of absorbent regions 30 . Therefore, the plurality of absorbent regions 30 protrude to the skin surface side Z1. In other words, at least a portion of the plurality of absorbent regions 30 are configured by the plurality of first embossed portions 16 .
- the plurality of absorbent regions 30 absorb urine excreted from the wearer by the pulp fibers and superabsorbent polymer contained in the first embossed portion 16 .
- each of the plurality of absorbent regions 30 includes a central region 36 and a peripheral region 37 arranged to surround the central region 36 .
- a central region 36 is a generally circular region located near the center of each absorbent region 30 .
- the peripheral region 37 is a substantially annular region arranged on the periphery of the absorbent region 30 .
- the central portion of the first embossed portion 16 is arranged in the central region 36 and the peripheral portion of the first embossed portion 16 is arranged in the peripheral region 37 .
- the density of the superabsorbent polymer present in the central region 36 is lower than the density of the superabsorbent polymer present in the peripheral region 37 .
- the density of the superabsorbent polymer present in the peripheral region 37 is set to be 10% or more higher than the density of the superabsorbent polymer present in the central region 36 .
- the density of the superabsorbent polymer present in the peripheral region 37 within the pair of channel portions 61 is set to be 50% or more higher than the density of the superabsorbent polymer present in the central region 36 within the pair of channel portions 61.
- the central region 36 which has a relatively low density of superabsorbent polymer, has a higher rate of water absorption than the peripheral region 37, which has a relatively high density of superabsorbent polymer.
- the maximum water absorption of the peripheral region 37 is higher than the maximum water absorption of the central region 36 .
- urine excreted from the wearer is supplied to the plurality of absorption regions 30 and is quickly absorbed in the central region 36 having a high water absorption rate.
- Urine absorbed in the central region 36 is diffused in the thickness direction Z of the absorbent body 13 .
- Urine that has not been absorbed in the central region 36 is absorbed by the peripheral region 37 .
- the peripheral region 37 contains the superabsorbent polymer at a high density, it can absorb a large amount of urine.
- the superabsorbent polymer has the property that the water permeability decreases as the water absorption increases.
- the barrier is a region in which water permeability is lower than that of other portions of the absorbent body 13, and has an annular shape when viewed from the skin surface side Z1.
- each of the plurality of absorbent regions 30 includes a central region 36 and a peripheral region 37 to allow urine to diffuse throughout the absorbent body 13 . Therefore, it is possible to absorb urine with the entire absorbent body 13 , and for example, urine leakage from the ends of the absorbent body 13 in the longitudinal direction Y can be suppressed.
- the density of the superabsorbent polymer present in the central region 36 is lower than the density of the superabsorbent polymer present in the peripheral region 37, but the density present in the intermediate layer 28 of the central region 36
- the density of the superabsorbent polymer present in the peripheral region 37 may be higher than the density of the superabsorbent polymer present in the intermediate layer 28 in the peripheral region 37 .
- FIG. BW1 in FIG. 7 represents the depth of the surface void 20
- BW2 in FIG. 7 represents the depth of the back surface void 21.
- T1 in FIG. 7 represents the thickness of the first embossed portion 16, and T2 in FIG. 7 represents the thickness of the second embossed portion 18.
- the thickness T1 of the first embossed portion 16 corresponds to the distance in the thickness direction Z between the front convex portion 16a and the rear concave portion 16b of the first embossed portion 16
- the thickness T2 of the second embossed portion 18 corresponds to the thickness of the second embossed portion 18.
- T3 in FIG. 7 represents the thickness of the absorbent body 13 .
- the thickness T3 of the absorbent body 13 corresponds to the distance in the thickness direction Z between the front convex portion 16 a of the first embossed portion 16 and the rear convex portion 18 b of the second embossed portion 18 .
- the thickness T3 of the absorbent body 13 is smaller than the sum of the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 .
- the sum of the thickness T1 of the first embossed portion 16 and the depth BW2 of the back surface void 21 is set to be approximately the same as the sum of the thickness T2 of the second embossed portion 18 and the depth BW1 of the surface void 20. .
- may be 50% or less, 40% or less, 30% or less, 20% or less, or 10% or less with respect to the thickness T3 of the absorbent body 13 .
- the thickness T1 of the first embossed portion 16 may be larger or smaller than the thickness T2 of the second embossed portion 18.
- the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is set small.
- the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is 50% or less, 40% or less, 30% or less, 20% or less with respect to the thickness T1 of the first embossed portion, or , 10% or less.
- the depth BW1 of the surface void 20 is set larger than the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 .
- the load may be concentrated on a portion with a small thickness, causing the absorber 13 to bend.
- the absorbent body 13 since the difference between the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 is small, the shape of the absorbent body 13 can be easily maintained. Moreover, since non-uniformity in the density of the absorbent body 13 is suppressed, urine can be absorbed in the entire absorbent body 13 with high uniformity. Furthermore, in the absorbent body 13, by increasing the depth BW1 of the surface voids 20, the voids formed between the wearer's skin surface and the surface 14 of the absorbent body 13 can be increased. As a result, a clear shadow of the surface voids 20 is formed on the surface 14 of the absorbent body 13, and the air permeability of the absorbent body 13 is improved.
- the depth BW1 of the surface void 20 and the depth BW2 of the back surface void 21 may be approximately the same depth.
- It may be 20% or less, or 10% or less.
- depth BW1 of surface air gap 20 may be greater than depth BW2 of back surface air gap 21 .
- the depth BW1 of the surface voids 20 is greater than the depth BW2 of the back surface voids 21, the breathability of the absorbent body 13 is improved.
- the depth BW1 of the surface gap 20 may be smaller than the depth BW2 of the backside gap 21 .
- the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 may differ depending on the position in the width direction X of the absorbent body 13 .
- the absorbent body 13 has a central portion 45 arranged substantially in the center in the width direction X and both side portions 46 arranged on both sides of the central portion 45 in the width direction X.
- the first embossed portion 16 and the second embossed portion 18 are formed in the central portion 45 and the side portions 46 .
- the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 of the central portion 45 are different from the thickness T1 of the first embossed portion 16 and the thickness T2 of the second embossed portion 18 of the side portions 46.
- the thickness T1 of the first embossed portions 16 in the central portion 45 may be greater than the thickness T1 of the first embossed portions 16 formed in the side portions 46 .
- the thickness T2 of the second embossed portions 18 of the central portion 45 may be greater than the thickness T2 of the second embossed portions 18 of the side portions 46 .
- the thickness T1 of the first embossed portions 16 of the central portion 45 may be smaller than the thickness T1 of the first embossed portions 16 formed on both side portions 46, and the thickness T2 of the second embossed portions 18 of the central portion 45 may be smaller than the thickness T2 of the second embossed portion 18 on both side portions 46 . Also, the thickness T1 of the first embossed portions 16 of the central portion 45 may be greater than the thickness T2 of the second embossed portions 18 of the central portion 45 .
- the difference between the thickness T1 of the first embossed portion 16 of the central portion 45 and the thickness T2 of the second embossed portion 18 of the central portion 45 is the thickness T1 of the first embossed portion 16 of the side portions 46 and the thickness T2 It may be larger than the difference from the thickness T2 of the second embossed portion 18 .
- the thick portion of the central portion 45 absorbs urine at a high absorption rate. can do.
- the central portion 45 near the wearer's urination opening can absorb urine at a high absorption rate, and the side portions 46 arranged around the wearer's legs can facilitate the diffusion of urine.
- W1 in FIG. 7 represents the width of the rear recessed portion 16b of the first embossed portion 16, and W2 in FIG. 7 represents the width of the surface recessed portion 18a of the second embossed portion 18.
- W3 in FIG. 7 represents the distance between the rear recesses 16b of the adjacent first embossed portions 16 among the plurality of first embossed portions 16, and W4 in FIG. It represents the distance between the surface recesses 18a. Note that the width W1 of the rear recessed portion 16b, the width W2 of the front recessed portion 18a, the distance W3 between adjacent rear recessed portions 16b, and the distance W4 between adjacent front recessed portions 18a are defined by the first virtual line 24a or the second virtual line 24b.
- the distance W3 between the adjacent back recesses 16b is set larger than the width W2 of the front recesses 18a.
- the distance W4 between the adjacent front surface recesses 18a is set larger than the width W1 of the rear surface recesses 16b.
- each of the plurality of absorbent regions 30 includes a central region 36 and a peripheral region 37 arranged to surround the central region 36.
- the density of superabsorbent polymer present is higher than the density of superabsorbent polymer present in central region 36 .
- This forms a low permeability barrier around the central region 36 when the peripheral region 37 absorbs urine.
- Such a barrier with low water permeability blocks the flow of urine in the longitudinal direction and diffuses the urine in the width direction X. As shown in FIG. Therefore, urine is efficiently absorbed by the absorber 13 .
- Urine absorption rate is increased by about 14% compared to the same density.
- the urine absorption rate is measured, for example, by dropping a test liquid onto the surface 14 of the absorber 13 tilted at 45° with respect to the horizontal plane and evaluating liquid flowability.
- the surface convex portion 16a of the first embossed portion 16 protrudes to the skin side Z1, and the surface concave portion 18a of the second embossed portion 18 is depressed to the non-skin side Z2.
- the height of the surface convex portion 16a of the first embossed portion 16 relative to the surface concave portion 18a of the portion 18 can be increased. Therefore, the depth BW1 of the surface void 20 formed between the wearer's skin surface and the surface recessed portion 18a of the second embossed portion 18 can be increased without increasing the thickness T3 of the absorbent body 13. Therefore, it is possible to both reduce the thickness of the absorbent body 13 and improve the breathability.
- the absorbent article 1 includes a pair of stretchable members 71 extending in the longitudinal direction Y, a plurality of stretchable members 33 extending in the width direction X so as to cross the absorbent body 13, and A plurality of elastic members 43 extending in the width direction X are provided as follows. The elastic member 71, the elastic member 33, and the elastic member 43 are contracted, and the absorber 13 is contracted in the width direction X and the longitudinal direction Y, so that the shadow of the surface concave portion 18a can be further clarified.
- the absorbent article 1 does not have a portion where the thickness of the absorbent body 13 is locally reduced, the absorbent body 13 is less likely to be torn. Therefore, the superabsorbent polymer contained in the absorbent body 13 is prevented from leaking out and adhering to the wearer. Furthermore, in the absorber 13 described above, the body pressure of the wearer is applied from the skin surface side Z1, so that the uneven shape of the absorber 13 is evened out, and when the body pressure is relieved, a restoring force is generated to absorb. The uneven shape of the body 13 is restored. At this time, air circulation occurs inside and outside the absorbent body 13, and the moisture inside the absorbent article 1 is released to the outside. This further enhances the breathability of the absorbent body 13 .
- the absorbent article 1 at least one of the plurality of vent holes 74 overlaps the first embossed portion 16 and the second embossed portion 18 of the absorbent body 13 when viewed from the skin side Z1. , the moisture in the surface recessed portion 18a and the moisture absorbed in the first embossed portion 16 can be released to the outside through the plurality of air holes 74. As shown in FIG. Therefore, the breathability of the absorbent article 1 can be further improved.
- a plurality of first embossed portions 16 and second embossed portions 18 are formed substantially throughout the absorbent body 13, but the plurality of first embossed portions 16 and second embossed portions 18 are It may be formed only on a part of the absorbent body 13 .
- the absorber 13 has a ventral portion 51 located on one end side in the longitudinal direction Y, a dorsal portion 52 located on the other end side in the longitudinal direction Y, and an ventral portion 51 .
- the plurality of first embossed portions 16 and second embossed portions 18 may be formed only in the intermediate portion 53 of the absorbent body 13 , including the intermediate portion 53 positioned between the dorsal portion 52 .
- a plurality of end embossed portions 55 may be formed on the ventral portion 51 and the dorsal portion 52 .
- the plurality of end embossed portions 55 are portions compressed toward the skin surface side Z1 or the non-skin surface side Z2 by being embossed.
- the plurality of end embossed portions 55 are formed at intervals in the longitudinal direction Y and extend in a wavy line between both ends in the width direction X of the ventral portion 51 and the dorsal portion 52 .
- the plurality of end embossed portions 55 block the flow of urine reaching the abdominal portion 51 and the dorsal portion 52 in the longitudinal direction Y, thereby suppressing urine leakage from the ends in the longitudinal direction Y of the absorber 13. .
- the density of the plurality of end embossed portions 55 formed on the ventral portion 51 and the dorsal portion 52 may be higher than the density of the second embossed portions 18 formed on the intermediate portion 53 .
- the density of the plurality of end embossed portions 55 is the ratio of the area of the portion where the end embossed portion 55 is formed to the area of the portion where the end embossed portion 55 is not formed among the ventral portion 51 and the dorsal portion 52.
- the density of the second embossed portions 18 represents the ratio of the area of the portion where the second embossed portions 18 are formed to the area of the portion where the second embossed portions 18 are not formed in the intermediate portion 53.
- the plurality of end embossed portions 55 may be formed only on one of the ventral portion 51 and the dorsal portion 52 . At least one end embossed portion 55 may be formed in the absorbent body 13 .
- the absorbent body 13 may further include a non-absorbent region 62 substantially free of superabsorbent polymer.
- the non-absorbent regions 62 are formed in the ventral portion 51 and the dorsal portion 52 . More specifically, one end side of the longitudinal direction Y of the absorbent body 13 from the boundary between the ventral part 51 and the intermediate part 53 and the longitudinal direction of the absorbent body 13 from the boundary between the dorsal part 52 and the intermediate part 53 is arranged on at least one of the other end sides of the
- the basis weight of the non-absorbent region 62 is set lower than the basis weight of other portions of the absorbent body 13 . Therefore, the average thickness of the ventral portion 51 and the dorsal portion 52 is smaller than the average thickness of the intermediate portion 53 .
- the back recessed portion 16b of the first embossed portion 16 is arranged on the non-skin surface side Z2 from the surface recessed portion 18a of the second embossed portion 18, but as shown in FIG. , the rear surface recessed portion 16b of the first embossed portion 16 may be arranged closer to the skin surface side Z1 than the surface recessed portion 18a of the second embossed portion 18.
- the depth BW1 of the surface void 20 can be increased by arranging the back surface recess 16b closer to the skin surface side Z1 than the surface recess 18a, and as a result, the breathability of the absorbent article 1 can be improved. .
- the second embossed portions 18 are intermittently formed along the lattice pattern 24, but the second embossed portions 18 may be formed continuously.
- the non-squeezed portions 25 may not be formed on the absorbent body 13 and the second embossed portions 18 may be formed continuously along a lattice pattern.
- the second embossed portion 18 may extend in a wavy line or curved line.
- the plurality of absorbent regions 30 are defined by a pattern that includes wavy or curvilinear imaginary lines.
- the absorbent body 13 does not necessarily have to have a plurality of first embossed portions 16 , and may have at least one first embossed portion 16 .
- the plurality of first embossed portions 16 are squeezed from the non-skin side Z2 toward the skin side Z1, and the second embossed portions 18 are compressed from the skin side Z1 toward the non-skin side Z2.
- the plurality of first embossed portions 16 are squeezed from the skin side Z1 toward the non-skin side Z2, and the second embossed portions 18 are pressed from the non-skin side Z2 to the skin. It may be compressed toward the face side Z1.
- the plurality of first embossed portions 16 has a surface concave portion recessed on the non-skin side Z2 and a back convex portion protruding on the non-skin side Z2, and a second embossed portion (skin side embossed portion ) 18 has a front convex portion protruding toward the skin side Z1 and a rear concave portion recessed toward the skin side Z1. Therefore, the plurality of absorbent regions 30 protrude to the non-skin surface side Z2, and the second embossed portions 18 are formed so as to surround each of the plurality of absorbent regions 30 .
- each of the plurality of absorbent regions 30 is surrounded by the second embossed portions 18 like weirs, so body fluid can be reliably absorbed in the plurality of absorbent regions 30 .
- the second embossed portions 18 may be intermittently formed along the grid pattern 24 when viewed from the skin surface side Z1.
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Abstract
Description
Claims (19)
- 着用者の腹側と背側と結ぶ長手方向、及び、前記長手方向と直交する幅方向を有する吸収性物品であって、
高吸水性ポリマーを含み、前記着用者の肌面側から見て二次元状に配置された複数の吸収領域を有する吸収体を備え、
前記複数の吸収領域の各々は、中心領域と、前記中心領域を囲むように配置された周辺領域とを含み、
前記周辺領域に存在する前記高吸水性ポリマーの密度は、前記中心領域に存在する前記高吸水性ポリマーの密度よりも高い、吸収性物品。 - 前記複数の吸収領域は、前記長手方向に交差する方向に沿って配列されている、請求項1に記載の吸収性物品。
- 前記複数の吸収領域は、前記長手方向及び前記幅方向に沿って二次元的に配列されている、請求項1又は2に記載の吸収性物品。
- 前記複数の吸収領域の少なくとも一部は、前記肌面側に突出している、請求項1~3の何れか一項に記載の吸収性物品。
- 前記吸収体は、前記着用者の非肌面側に窪む表面凹部と前記非肌面側に突出する裏面凸部とを含む非肌面側エンボス部を含み、
前記非肌面側エンボス部は、前記複数の吸収領域の各々を囲むように形成されている、請求項4に記載の吸収性物品。 - 前記非肌面側エンボス部は、前記肌面側から見て断続的に形成されている、請求項5に記載の吸収性物品。
- 前記複数の吸収領域の少なくとも一部は、前記着用者の非肌面側に突出している、請求項1~6の何れか一項に記載の吸収性物品。
- 前記吸収体は、前記着用者の肌面側に突出する表面凸部と前記肌面側に窪む裏面凹部とを含む肌面側エンボス部を含み、
前記肌面側エンボス部は、前記複数の吸収領域の各々を囲むように形成されている、請求項7に記載の吸収性物品。 - 前記肌面側エンボス部は、前記肌面側から見て断続的に形成されている、請求項8に記載の吸収性物品。
- 前記周辺領域に存在する前記高吸水性ポリマーの密度は、前記中心領域に存在する前記高吸水性ポリマーの密度よりも10%以上高い、請求項1~9の何れか一項に記載の吸収性物品。
- 前記複数の吸収領域は、格子状のパターンによって画成されている、請求項1~10の何れか一項に記載の吸収性物品。
- 前記吸収体は、前記格子状のパターンの格子点に対応する位置に配置され、エンボス加工が施されていない非圧搾部を含む、請求項11に記載の吸収性物品。
- 前記吸収体は、前記長手方向に延在する一対のチャネル部を更に含み、
前記一対のチャネル部に含まれる前記高吸水性ポリマーの密度は、前記吸収体の他の部分に含まれる前記高吸水性ポリマーの密度よりも低い、請求項1~12の何れか一項に記載の吸収性物品。 - 前記一対のチャネル部内の前記周辺領域に存在する前記高吸水性ポリマーの密度は、前記一対のチャネル部内の前記中心領域に存在する前記高吸水性ポリマーの密度よりも50%以上高い、請求項13に記載の吸収性物品。
- 前記吸収体は、前記長手方向の一端側に位置する腹側部と、前記長手方向の他端側に位置する背側部と、前記腹側部と前記背側部との間に位置する中間部とを含み、
前記腹側部及び前記背側部の少なくとも一方は、前記吸収体の前記幅方向の両端部の間で延在するエンドエンボス部を含む、請求項1~13の何れか一項に記載の吸収性物品。 - 前記腹側部及び前記背側部の厚みの平均値は、前記中間部の厚み平均値よりも小さい、請求項15に記載の吸収性物品。
- 前記吸収体は、前記高吸水性ポリマーを含まない非吸収領域を更に含み、
前記非吸収領域は、前記腹側部と前記中間部との境界よりも前記吸収体の前記長手方向の一端側、又は、前記背側部と前記中間部との境界よりも前記吸収体の前記長手方向の他端側に配置されている、請求項16に記載の吸収性物品。 - 前記吸収体は、前記着用者の肌面側に位置する第1吸収層、前記着用者の非肌面側に位置する第2吸収層、及び、前記第1吸収層と前記第2吸収層との間に位置する中間層を有し、
前記第1吸収層、前記第2吸収層及び前記中間層は高吸水性ポリマーを含む、請求項1~17の何れか一項に記載の吸収性物品。 - 前記中心領域の前記中間層に存在する前記高吸水性ポリマーの密度は、前記周辺領域の前記中間層に存在する前記高吸水性ポリマーの密度よりも高い、請求項18に記載の吸収性物品。
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|---|---|---|---|---|
| WO2016092843A1 (ja) * | 2014-12-10 | 2016-06-16 | 王子ホールディングス株式会社 | 吸収性物品 |
| WO2016098867A1 (ja) * | 2014-12-18 | 2016-06-23 | 花王株式会社 | 吸収体、吸収体の製造方法及び吸収体の製造装置 |
| JP2018161266A (ja) * | 2017-03-24 | 2018-10-18 | 大王製紙株式会社 | パンツタイプ使い捨ておむつ |
| JP2019042387A (ja) * | 2017-09-06 | 2019-03-22 | 王子ホールディングス株式会社 | 吸収性物品 |
| JP2019150344A (ja) * | 2018-03-05 | 2019-09-12 | 大王製紙株式会社 | 吸収性物品 |
| JP2021007545A (ja) * | 2019-06-28 | 2021-01-28 | ユニ・チャーム株式会社 | 吸収性物品 |
| JP2021164570A (ja) * | 2020-04-07 | 2021-10-14 | 王子ホールディングス株式会社 | 吸収性物品の製造方法 |
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| JP6558281B2 (ja) * | 2016-03-08 | 2019-08-14 | 王子ホールディングス株式会社 | 吸収性物品、その製造装置および製造方法 |
| JP7158343B2 (ja) * | 2019-06-20 | 2022-10-21 | ユニ・チャーム株式会社 | 吸収性物品 |
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|---|---|---|---|---|
| WO2016092843A1 (ja) * | 2014-12-10 | 2016-06-16 | 王子ホールディングス株式会社 | 吸収性物品 |
| WO2016098867A1 (ja) * | 2014-12-18 | 2016-06-23 | 花王株式会社 | 吸収体、吸収体の製造方法及び吸収体の製造装置 |
| JP2018161266A (ja) * | 2017-03-24 | 2018-10-18 | 大王製紙株式会社 | パンツタイプ使い捨ておむつ |
| JP2019042387A (ja) * | 2017-09-06 | 2019-03-22 | 王子ホールディングス株式会社 | 吸収性物品 |
| JP2019150344A (ja) * | 2018-03-05 | 2019-09-12 | 大王製紙株式会社 | 吸収性物品 |
| JP2021007545A (ja) * | 2019-06-28 | 2021-01-28 | ユニ・チャーム株式会社 | 吸収性物品 |
| JP2021164570A (ja) * | 2020-04-07 | 2021-10-14 | 王子ホールディングス株式会社 | 吸収性物品の製造方法 |
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