WO2023233780A1 - 吸収性物品 - Google Patents
吸収性物品 Download PDFInfo
- Publication number
- WO2023233780A1 WO2023233780A1 PCT/JP2023/012403 JP2023012403W WO2023233780A1 WO 2023233780 A1 WO2023233780 A1 WO 2023233780A1 JP 2023012403 W JP2023012403 W JP 2023012403W WO 2023233780 A1 WO2023233780 A1 WO 2023233780A1
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- WIPO (PCT)
- Prior art keywords
- basis weight
- low basis
- weight portion
- groove
- compression
- Prior art date
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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
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/47—Sanitary towels, incontinence pads or napkins
- A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
-
- 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
- A61F13/51—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 outer layers of the pads
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
-
- 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
Definitions
- the present invention relates to absorbent articles.
- Patent Document 1 discloses an absorbent structure in which front and rear slits extending in the front-rear direction and penetrating the absorbent core in the thickness direction, and auxiliary slits extending outward in the width direction from the front and rear slits are formed in the absorbent core in the rear region. The item is listed.
- the main body may not be able to fully fit the body part along the intergluteal cleft depending on the wearer's wearing method, movement during wearing, etc. Therefore, there is still a concern that body fluids may leak through the intergluteal cleft to the rear or posterolateral side of the intergluteal cleft. Therefore, there is a need to improve the fit to the buttocks, especially over the area where the depth of the intergluteal cleft changes, and to prevent so-called leakage.
- an object of one aspect of the present invention is to provide an absorbent article that has a high fit to the buttocks and can prevent the occurrence of leakage.
- One aspect of the present invention is an elongated absorbent body comprising a skin-side top sheet, a non-skin side back sheet opposite to the skin side, and an absorbent body disposed between the top sheet and the back sheet.
- the absorbent body has a main body, and in the intergluteal cleft facing region that faces the wearer's intergluteal cleft when worn, the pulp basis weight of the absorbent body is at least on the center line extending along the longitudinal direction of the main body, and the pulp basis weight of the absorbent body is at least on the side and rear side thereof.
- the width of the low basis weight portion is 5 to 25% of the width of the absorbent body.
- a compressed groove is formed that is depressed toward the back sheet side, and the compressed groove includes a rearward compressed groove that is convex toward the rear and surrounds the rear end of the low basis weight portion.
- an absorbent article that has a high fit to the buttocks and can prevent the occurrence of leakage.
- FIG. 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the top sheet side. This is a cross section taken along line II in FIG. 1.
- 2 is a cross section taken along line II-II in FIG. 1.
- FIG. 2 is a plan view of the absorbent article of FIG. 1 with the absorbent body exposed. It is a figure for demonstrating the function of a rear low basis weight part. 2 is a partially enlarged view of FIG. 1.
- FIG. 1 is a plan view of an absorbent article according to one embodiment of the present invention, viewed from the top sheet side. This is a cross section taken along line II in FIG. 1.
- 2 is a cross section taken along line II-II in FIG. 1.
- FIG. 2 is a plan view of the absorbent article of FIG. 1 with the absorbent body exposed. It is a figure for demonstrating the function of a rear low basis weight part. 2 is a partially enlarged view of FIG. 1.
- FIG. 1 is a plan view of an
- the absorbent article according to this embodiment may be a sanitary napkin, a diaper, a pad for light incontinence, etc., but in the following, the basics of absorbent articles will be explained using sanitary napkins for night use or for long periods of time as an example.
- FIG. 1 shows a plan view of the absorbent article 1.
- FIG. 2 shows a sectional view taken along the line II in FIG. 1
- FIG. 3 shows a sectional view taken along the line II-II in FIG.
- the absorbent article 1 includes a liquid-permeable top sheet 3 placed on the side that faces the wearer's skin when worn, that is, the skin side, and a liquid-permeable top sheet 3 placed on the side opposite to the skin side.
- a liquid-impermeable back sheet 2 is provided on the non-skin side (underwear side).
- an absorbent body (absorbent core) 4 is arranged between the backsheet 2 and the topsheet 3.
- the backsheet 2, absorbent body 4, and topsheet 3 are laminated to form a main body (absorbent article main body) 8.
- the absorbent core 4 is arranged so as not to protrude from the backsheet 2 and topsheet 3 in plan view. At both ends in the longitudinal direction D1, the edges of the backsheet 2 and the edges of the topsheet 3 may be joined by adhesive, heat sealing, or the like.
- the absorbent article 1 has an elongated pad shape (a shape whose thickness is smaller than its width and length).
- the longitudinal direction (front-back direction) of the absorbent article 1 is referred to as D1
- the lateral direction (left-right direction or width direction) perpendicular to the longitudinal direction D1 is referred to as D2.
- the longitudinal direction D1 is a direction corresponding to the front-back direction of the wearer's body when the absorbent article 1 is worn
- the lateral direction D2 is a direction corresponding to the left-right direction of the body.
- the main body 8 has a planar shape that is approximately symmetrical with respect to a center line (longitudinal center line) CL extending in the longitudinal direction D1, but the shape of the main body 8 is It does not necessarily have to be line symmetric.
- configurations other than the shapes of the absorbent article 1 and main body 8 may be approximately symmetrical with respect to the center line CL as an axis of symmetry, or may be asymmetrical.
- the back sheet 2 may be a sheet that has at least water-blocking properties, and may be, for example, a sheet made of olefin resin such as polyethylene or polypropylene. Further, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a laminated sheet of a nonwoven fabric with a waterproof film interposed therebetween to ensure substantially liquid impermeability, etc. can be used. Furthermore, from the viewpoint of preventing stuffiness, it is more desirable to use a material having moisture permeability.
- Such water-impermeable and moisture-permeable sheet materials are made by melt-kneading an inorganic filler into an olefin resin such as polyethylene or polypropylene, forming a sheet, and then stretching the sheet in uniaxial or biaxial directions.
- An olefin resin such as polyethylene or polypropylene
- a porous sheet or the like can be used.
- the backsheet 2 may be a sheet having the same external shape as the absorbent article 1.
- the top sheet 3 can be a liquid-permeable sheet that quickly allows body fluids such as menstrual blood, vaginal discharge, and urine to pass through.
- a perforated or non-perforated nonwoven fabric, a porous plastic sheet, or the like is suitably used.
- the material fibers constituting the nonwoven fabric include, for example, olefins such as polyethylene and polypropylene, synthetic fibers such as polyester and polyamide, recycled fibers such as rayon and cupro, blended fibers thereof, and natural fibers such as cotton, either singly or Two or more types can be used in combination.
- processing methods for nonwoven fabrics include spunlace method, spunbond method, thermal bond method, melt blown method, needle punch method, and the like.
- the spunlace method is preferred because it can produce a nonwoven fabric with excellent flexibility
- the spunbond method is preferred because it can produce a nonwoven fabric with excellent drapability
- the thermal bonding method is preferred because it can produce a bulky and soft nonwoven fabric.
- composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., which have a core of fibers with a high melting point and a sheath of fibers with a low melting point, can also be used.
- the absorbent body 4 is not limited to any material as long as it can absorb and retain body fluids, but preferably contains cotton-like pulp and a water-absorbing polymer.
- a water-absorbing polymer superabsorbent polymer granules (SAP), superabsorbent fibers (SAF), and combinations thereof can be used.
- SAP superabsorbent polymer granules
- SAF superabsorbent fibers
- the pulp include chemical pulp obtained from wood, cellulose fibers such as dissolving pulp, and those made of artificial cellulose fibers such as rayon and acetate.
- raw materials for chemical pulp hardwoods, softwoods, etc. are used, and softwoods are preferably used because of their long fiber length.
- Synthetic fibers may be mixed in the absorber 4.
- synthetic fibers polyolefins such as polyethylene and polypropylene, polyesters such as polyethylene terephthalate and polybutylene terephthalate, polyamides such as nylon, and copolymers thereof can be used, and two of these may be used in combination. You can also do it.
- Composite fibers such as core-sheath type fibers, side-by-side type fibers, split type fibers, etc., which have a core of fibers with a high melting point and a sheath of fibers with a low melting point, can also be used. Note that it is also possible to use hydrophobic fibers whose surface is treated with a hydrophilizing agent to impart affinity for body fluids.
- the absorbent body 4 is preferably manufactured by a fiber stacking or air laying method.
- the absorbent body 4 may be formed with a plurality of compressed absorbent portions that are partially recessed from the top sheet 3 side to the back sheet 2 side and spaced apart from each other in a plan view (described in detail later).
- the absorbent body 4 may be wrapped with an enveloping sheet made of colored or non-colored (white) crepe paper, nonwoven fabric, etc., in order to prevent twisting or cracking or spillage of polymer particles. good.
- side sheets 7, 7 are arranged on the skin side along the longitudinal direction D1.
- the side sheet 7 is constructed using a material that has been entirely or partially subjected to an appropriate water-repellent treatment or hydrophilic treatment, depending on the purpose of preventing the penetration of body fluids or enhancing the texture. It may be. It is preferable that the side sheet 7 is a nonwoven fabric containing natural fibers, synthetic fibers, recycled fibers, etc., or made of these fibers.
- the side sheet 7 When the side sheet 7 is a nonwoven fabric, it may be an air-through nonwoven fabric, a spunlace nonwoven fabric, a spunbond nonwoven fabric, a meltblown nonwoven fabric, etc., but from the viewpoint of being soft and resistant to creases and wrinkles, it can improve the feel to the touch. Preferably, it is an air-through nonwoven fabric.
- the side sheet 7 may be water-repellent treated with a silicon-based, paraffin-based, or the like water repellent.
- the side sheet 7 may be folded back on the inside in the lateral direction D2, thereby forming a plurality of layers of band-shaped portions extending along the side of the main body 8. Gathers may be formed by arranging elastic elastic members in a stretched state along the longitudinal direction D1 between the plurality of layers. In this specification, the folding of the side sheet 7 and the structure of the gathers will not be explained, and will not be illustrated in the drawings.
- the absorbent article 1 has a body fluid discharge port facing region C that faces the wearer's body fluid discharge port (vaginal opening in the illustrated example) when worn, and a body fluid discharge port facing region C that is adjacent to the front of the body fluid discharge port facing region C and that is adjacent to the front side of the body fluid discharge port facing region C and A front region F which is the region up to the front end, a perineum facing region (intermediate region) M adjacent to the rear of the body fluid outlet facing region C and facing near the wearer's perineum when worn, and a perineum facing region M
- the absorbent article may include a buttock-facing region B that is adjacent to the rear of the absorbent article and extends to the rear end of the absorbent article 1 and faces the buttock of the wearer when worn.
- the buttock-facing region B includes a front buttock-facing region B1 adjacent to the perineum-facing region M, and a rear buttock-facing region B2 adjacent to the rear of the front buttock-facing region B1.
- the front buttock facing region B1 is a region that mainly faces the intergluteal cleft (buttock groove), and is a region that faces a region including the anus.
- the rear buttock opposing region B2 is a region that can face the rear part of the gluteal cleft or a region farther back from the vicinity of the rear end of the gluteal cleft, particularly a region behind (in a standing state, above) the gluteal groove, which can be said to be the boundary between the buttocks and legs. It may be. Note that the above description of the opposing relationship between the area of the main body 8 and the body of the wearer may be approximately the range when the wearer wears the absorbent article in a normal wearing manner while lying down. It is possible, but this is just a guideline.
- the length in the longitudinal direction D1 of the body fluid outlet facing region C may be 50 to 120 mm, and the length in the longitudinal direction D1 of the buttocks facing region B may be 90 to 230 mm. Further, in the configuration according to the present embodiment, for example, the total length of the perineum facing region M and the buttock facing region B, preferably the length D1 in the longitudinal direction of the buttock facing region B, is set in the longitudinal direction in which the wing flap WF is provided. This is suitable for absorbent articles with a long rear part, which is greater than the length of D1.
- the length in the longitudinal direction D1 of the front buttock-facing region (gluteal cleft-facing region) B1 may be 40 to 100 mm, and the length in the longitudinal direction D1 of the rear buttock-facing region B2 may be 40 to 120 mm. Further, the total length of the absorbent article 1 in the longitudinal direction D1 may be 250 to 450 mm.
- the absorbent article 1 may include a pair of wing flaps WF, WF extending outward in the lateral direction D2 from both sides of the body fluid outlet facing region C, respectively.
- An anti-slip material (not shown) may be provided on the non-skin side of the wing flaps WF, WF, and this anti-slip material allows the wing flaps WF, WF and the main body 8 to sandwich the underwear when worn.
- Wing flaps WF and WF can be folded back to the non-skin side and attached to underwear. Thereby, the absorbent article 1 can be securely fixed to the underwear.
- the wing flaps WF, WF are formed by joining the outwardly extending portions of the side sheets 7, 7 in the lateral direction D2 and the outwardly extending portions of the backsheet 2 in the lateral direction D2.
- a pair of hip hold flaps HF, HF may be formed extending from the side of the main body 8 outward in the lateral direction D2 from the perineum facing region M to the buttock facing region B.
- the hip hold flaps HF, HF prevent the leakage of body fluids at the rear of the absorbent article 1, and by increasing the contact area with the buttocks, the entire absorbent article 1 is held against the underwear, especially in the lateral direction D2. It also has the function of making it difficult to shift and stabilizing the mounting position of the absorbent article 1.
- the hip hold flaps HF, HF may also be formed by joining the outwardly extending portions of the side sheets 7, 7 in the lateral direction D2 and the outwardly extending portions of the backsheet 2 in the lateral direction D2.
- FIG. 4 shows a plan view of the absorbent article 1 of FIG. 1 in which the top sheet 3 and side sheets 7, 7 are removed to expose the absorbent core 4.
- the basis weight of the absorber 4 specifically the pulp basis weight
- the absorbent body 4 mainly includes a medium basis weight portion 4M having a medium pulp basis weight, a high basis weight portion 4H having a higher pulp basis weight than the medium basis weight portion 4M, and a low basis weight portion having a lower pulp basis weight than the medium basis weight portion 4M. It has 4L.
- the low basis weight part 4L is arranged in the perineum facing region M and has a front low basis weight part 4Lf having the same width as the absorbent body 4, and a thin rear part arranged in the center in the lateral direction D2 of the intergluteal cleft facing region B1. It has a low basis weight portion 4Lb. It is preferable that the front low basis weight part 4Lf and the rear low basis weight part 4Lb are formed continuously.
- the high basis weight portion 4H, the medium basis weight portion 4M, and the low basis weight portion 4L may be uniform basis weight regions in which the basis weight is approximately uniform within each portion.
- Approximately uniform basis weight within a predetermined portion or predetermined area means that even if there are some areas where the basis weight is slightly different, the difference from the average basis weight within the predetermined portion or area is 20% or less of the average basis weight, Preferably it is 10% or less, more preferably 5% or less.
- the front low basis weight portion 4Lf and the rear low basis weight portion 4Lb may have different basis weights, and each may have a substantially uniform basis weight. In that case, the basis weight of the rear low basis weight portion 4Lb may be slightly smaller than that of the front low basis weight portion 4Lf.
- the absorbent body 4 contains pulp and a water-absorbing polymer as described above, it is preferable that the basis weight of the water-absorbing polymer is approximately the same throughout the absorbent body 4. In that case, the magnitude relationship of the pulp basis weight is reflected in the magnitude relationship of the pulp basis weight.
- FIG. 5 is a schematic diagram of a cross section (corresponding to the cross section taken along the line II in FIG. 1) of the absorbent article 1 according to the present embodiment, together with the buttocks Den of the wearer.
- illustration of specific members such as sheets included in the absorbent article 1 is omitted.
- the above-mentioned rear low basis weight portion 4Lb is more flexible than its lateral portions, that is, the medium basis weight portion 4M on the outside in the lateral direction D2, and has lower rigidity against bending. Therefore, when the intergluteal cleft opposing region B1 receives a force from the outside of the lateral direction D2 (arrows from both sides of the lateral direction D2 in FIG. 5), for example, due to the influence of force from both legs, or the wearer deforms the main body by himself/herself. If force is applied during the process, the rear low basis weight portion 4Lb can easily bulge toward the skin side, forming a mountain Mt (FIG. 5(a)).
- the rear low basis weight portion 4Lb has an elongated shape along the longitudinal direction D1, and its lateral direction D2 length (width of the rear low basis weight portion 4Lb) is the lateral direction D2 length of the absorbent body 4 (absorbent body 4 width) of 5 to 25%. Therefore, such a narrow rear low basis weight portion 4Lb has a size that can easily fit into the intergluteal cleft. Therefore, when the main body is deformed so as to fit into the intergluteal cleft when worn, it can be brought into close contact with the deep part of the intergluteal cleft (FIG. 5(b)).
- the rear low basis weight portion 4Lb can be brought into close contact with the intergluteal cleft.
- the rear low basis weight portion 4Lb is a portion where an absorbent body is present, so that body fluid can be immediately absorbed. Therefore, leakage can be effectively prevented.
- people who wear absorbent articles for nighttime use or for long periods of time often wear the absorbent article by deforming the absorbent article themselves so that the main body deeply fits into the intergluteal cleft.
- the absorbent article 1 according to this embodiment is suitably used in such a usage mode.
- the rear low basis weight portion 4Lb is surrounded on both sides and rear by the medium basis weight portion 4M.
- the extension range of the rear low basis weight portion 4Lb in the longitudinal direction D1 is up to this side of the rear end of the absorbent core 4, and is preferably in the same range in the longitudinal direction D1 as the intergluteal cleft facing region B1. It's good. Therefore, it is possible to prevent the mountain Mt (FIG. 5) that may be formed by the rear low basis weight portion 4Lb at the time of attachment from continuing for a long time rearward.
- the main body it is possible to adapt the main body to the shape of the region where the intergluteal cleft is shallow at the rear of the buttocks, or near the terminal end of the intergluteal cleft or further behind the terminal end. In this way, it is possible to improve the fit from the intergluteal cleft to a region near the end of the intergluteal cleft or a region behind the end of the intergluteal cleft.
- the width (horizontal direction D2 length) x (FIG. 4) of the rear low basis weight portion 4Lb may be preferably 5 to 30 mm, more preferably 10 to 20 mm.
- the length of the rear low basis weight portion 4Lb (length in longitudinal direction D1) y (FIG. 4) may be preferably 40 to 80 mm, more preferably 50 to 70 mm.
- the length of the crest Mt that enables the absorption of body fluid at the intergluteal cleft is obtained, and the crest Mt continues backwards, impairing the adhesion at a shallow position of the intergluteal cleft. You can prevent this from happening.
- the value of the ratio (y/x) of the length y to the width x of the rear low basis weight portion 4Lb may be 2 to 8.
- the size of the rear low basis weight portion 4Lb to obtain a peak shape suitable for adhering closely to the intergluteal cleft can be obtained.
- the basis weight of at least the rear low basis weight portion 4Lb may be preferably 200 to 500 gsm, more preferably 300 to 400 gsm. Further, the basis weight of the medium basis weight portion 4M adjacent to the sides and rear of the rear low basis weight portion 4Lb may be preferably 300 to 600 gsm, more preferably 400 to 500 gsm. In addition, from the viewpoint of improving the above-mentioned effect of the rear low basis weight part 4Lb, the basis weight of the rear low basis weight part 4Lb may be 60 to 90% of the basis weight of the medium basis weight part 4M.
- the main body 8 of the absorbent article 1 of this embodiment has compressed grooves (also referred to as fit embossing) formed by compressing at least the top sheet 3 and the absorbent core 4 from the top sheet 3 side. It may be formed. Since the compression groove has the function of drawing in and retaining body fluid, it can contribute to preventing the diffusion of body fluid or guiding the body fluid.
- the compressed groove may include a plurality of compressed grooves (indicated by reference numerals 10, 11, 12, and 13). The compressed grooves may be formed symmetrically with respect to the longitudinal center line CL of the absorbent article 1 in plan view, but do not necessarily have to be symmetrically formed.
- the compressed grooves can be formed, for example, by passing a laminate in which at least the top sheet 3 and the absorbent core 4 are laminated between a pair of pressure rolls. In that case, a convex roll is placed on the top sheet 3 side of the laminate, and a flat roll is placed on the absorber 4 side, and the laminate is sandwiched between the two rolls to apply pressure.
- the compression groove may include a low compression section and a high compression section that is compressed at a higher pressure within the low compression section. In the drawings, the high compression area is shown in black.
- a pair of central compression grooves 10, 10 extend along the longitudinal direction D1, mainly from the region C facing the body fluid outlet to the region M facing the perineum.
- the pair of central compressed grooves 10, 10 are formed on both sides of the longitudinal center line CL so as to be spaced apart from each other.
- the pair of central compressed grooves 10, 10 are arranged so as not to overlap with the high basis weight portion 4H.
- the distance between the pair of central compressed grooves 10, 10 in the lateral direction D2 may be constant or may vary. For example, as shown in FIG. 1, it may become smaller near the boundary between the body fluid outlet facing region C and the perineum facing region M, become larger again behind it, and become smaller toward the rear end.
- a first rear compression groove (rear compression groove) 11 is formed at the rear of the pair of central compression grooves 10, 10 and spaced apart from the pair of central compression grooves 10, 10.
- the first rear compression groove 11 is formed in the buttock facing region B, mainly in the intergluteal cleft facing region B1.
- the first rear compressed groove 11 is formed across the longitudinal center line CL, and has a generally rearwardly convex shape. More specifically, the first rear compressed groove 11 is a horseshoe-shaped compressed groove 11h that has a horseshoe shape (or a shape in which the ends are brought close to each other in a U-shape) that overlaps the longitudinal center line CL. including.
- the first rear compression groove 11 may further include side compression grooves 11s, 11s that branch from the sides of the horseshoe-shaped compression groove 11h and extend forward.
- a second rear compression groove (second compression groove) 12 is formed at the rear of the first rear compression groove 11 and spaced apart from the first rear compression groove 11 .
- the second rear compression groove 12 is a groove extending along the lateral direction D2, and has a rearwardly convex shape.
- a front pressing groove 13 is formed in front of the pair of central pressing grooves 10, 10.
- the front compressed groove 13 has a closed shape formed by combining compressed grooves that are convexly curved forward with different radii of curvature.
- FIG. 6 shows an enlarged view of the region in FIG. 1 where the rear low basis weight portion 4Lb is arranged in the absorber 4 and its vicinity.
- the first rear compressed groove 11 more specifically, the horseshoe-shaped compressed groove 11h, is formed so as to surround the rear end portion of the above-mentioned rear low basis weight portion (elongated low basis weight portion) 4Lb.
- the rear low basis weight portion 4Lb when the rear low basis weight portion 4Lb receives a force from the outside in the lateral direction D2 during installation, it bulges toward the top sheet 3 side and deforms so as to form a mountain Mt (FIG. 5).
- this mountain Mt can be interrupted at the first rear compression groove 11 extending in the lateral direction D2, it is possible to further prevent the mountain Mt from continuing backward for an excessively long time. Since the region behind the first rear compression groove 11 can be aligned with a shallow part of the intergluteal cleft or a part without an intergluteal cleft, leakage of body fluid to the rear or diagonally backward direction can be prevented.
- the body fluid that has migrated rearward and diagonally backward from the rear low basis weight portion 4Lb is blocked by the first rear compression groove 11, so this blocking action can also improve the leakage prevention effect.
- the body fluid that has diffused from the rear low basis weight part 4Lb to the lateral medium basis weight part 4M is also transferred to the side compressed area extending approximately along the longitudinal direction D1 after branching from the horseshoe-shaped compressed groove 11h. It is blocked by the grooves 11s, 11s. Therefore, even if a large amount of body fluid migrates to the rear low basis weight portion 4Lb, leakage diagonally rearward can be prevented.
- the front ends 11st, 11st of the side compressed grooves 11s, 11s are preferably located forward of the center in the longitudinal direction D1 of the rear low basis weight portion 4Lb,
- the position may be 30% or less, preferably 25% or less of the length y in the longitudinal direction D1 of the rear low basis weight portion 4Lb from the front end of the rear low basis weight portion 4Lb.
- the density (pulp density) of the rear low basis weight part 4Lb was compared with the density (pulp density) of the middle basis weight part 4M located on the side of the rear low basis weight part 4Lb and surrounded by the lateral compression grooves 11s.
- the density of the rear low basis weight portion 4Lb is lower. That is, the rear low basis weight portion 4Lb is preferably a portion where the pulp basis weight is smaller and the pulp density is lower than the side and rear portions. This further promotes the transfer of body fluid from the rear low basis weight part 4Lb to the medium basis weight part 4M on the side thereof (FIG. 6).
- the average pulp density in the rear low basis weight portion 4Lb may be preferably 0.035 to 0.1 g/cm 3 , more preferably 0.05 to 0.08 g/cm 3 .
- the average pulp density of the area surrounded by the side compressed grooves 11s on the sides of the rear low basis weight part 4Lb (a part of the middle basis weight part 4M) is preferably 0.055 to 0.15 g/cm. 3 , more preferably 0.07 to 0.12 g/cm 3 .
- the distribution of pulp density in the intergluteal cleft facing region B1 as described above allows for smoother absorption and diffusion of body fluids.
- the body fluid that has been directly absorbed by the rear low basis weight portion 4Lb or that has diffused within the absorber 4 from the body fluid outlet facing area C and the perineum facing area M is absorbed along the longitudinal center line CL. Then, it moves further rearward within the rear low basis weight portion 4Lb (FIG. 6).
- diffusion from the rear low basis weight part 4Lb, which has a relatively low pulp density, to the middle part 4M, which has a relatively high pulp density and is disposed on the side thereof can also be promoted (FIG. 6). Therefore, the side portion of the absorbent core 4 in the intergluteal cleft opposing region B1 can be utilized, and the amount of body fluid transferred to the rear can be suppressed.
- the rear low basis weight portion 4Lb extends at least in the longitudinal direction from the rear ends 10bt, 10bt of the pair of central compressed grooves 10, 10 to the front ends 11ft, 11ft of the horseshoe-shaped compressed groove 11h of the first rear compressed groove 11. Preferably, it extends to D1. Further, it is preferable that the side portion (the outer edge in the lateral direction D2) of the rear low basis weight portion 4Lb is in contact with or slightly overlaps the rear ends 10bt, 10bt of the pair of central compressed grooves 10, 10 (FIG. 6). . As a result, when the rear low basis weight part 4Lb is deformed so as to bulge toward the top sheet 3 side during installation (FIG.
- the rear ends 10bt, 10bt of the pair of central compressed grooves 10, 10 are in front of the rear low basis weight part 4Lb. It can serve as a starting point for excitement. Moreover, it is preferable that the side part (the outer edge in the lateral direction D2) of the rear low basis weight part 4Lb is in contact with or slightly overlaps the front ends 11ft and 11ft of the horseshoe-shaped compressed groove 11h of the first rear compressed groove 11 ( Figures 3 and 6). As a result, when the rear low basis weight portion 4Lb is deformed so as to bulge toward the top sheet 3 side during installation (FIG.
- the front ends 11ft, 11ft of the horseshoe-shaped compressed groove 11h of the first rear compressed groove 11 are changed to the rear low basis weight portion.
- the rear part of 4Lb can serve as a base point for swelling. Therefore, from the viewpoint of forming the rear low basis weight portion 4Lb at the rear of the swell base point, the front ends 11ft, 11ft of the horseshoe-shaped compressed groove 11h of the first rear compressed groove 11 are located at the center of the longitudinal direction D1 of the rear low basis weight portion 4Lb.
- the rear low basis weight part 4Lb slightly overlaps the central compressed grooves 10, 10 or the first rear compressed groove 11, from the viewpoint of not hindering the swelling of the rear low basis weight part 4Lb, the high compressed part (black) It is preferable that they do not overlap.
- the length x in the lateral direction D2 of the rear low basis weight portion 4Lb and the length x of the first rear compressed groove 11 are It is preferable that the distance d11 between the front ends 11ft and 11ft of the horseshoe-shaped compressed groove 11h is approximately equal.
- “approximately equal” means that, if there is a difference between the two, the difference is 10% or less, preferably 5% or less, with respect to the larger of the two.
- the rear end portion of the rear low basis weight portion 4Lb may be separated from the first rear compressed groove 11 in plan view, but may be in contact with the first rear compressed groove 11 or overlap as shown in FIG. Preferably. Further, it extends to the rear end of the first rear compressed groove 11, that is, the apex of the horseshoe-shaped compressed groove 11h, and is in contact with or overlaps the horseshoe-shaped compressed groove 11h at the position of the apex of the horseshoe-shaped compressed groove 11h. is preferred. Thereby, the body fluid that has diffused backward in the rear low basis weight portion 4Lb is easily drawn into the first rear compression groove 11.
- the body fluid drawn into the first rear compression groove 11 can be guided first in the extending direction of the horseshoe-shaped compression groove 11h, that is, outward in the lateral direction D2, and further forward. A part of the body fluid may also be guided forward along the side compression grooves 11s, 11s. Therefore, the effect of preventing rearward leakage is enhanced.
- the main body 8 can be bent along the first rear compressed groove 11, and three-dimensional curving along the roundness of the buttock is possible.
- the branching positions of the side compression grooves 11s and 11s (FIG. 6) become recessed parts 11r and 11r that are recessed forward when viewed from the rear, when curving the buttocks facing region B, the recessed parts 11r, 11r also serves as a base point for bending, and a smoother curve can be formed.
- the embodiment according to appendix 1 is an elongated absorbent body comprising a skin-side top sheet, a non-skin-side back sheet opposite to the skin side, and an absorbent body disposed between the top sheet and the back sheet.
- the absorbent body has a main body, and in the intergluteal cleft facing region that faces the wearer's intergluteal cleft when worn, the pulp basis weight of the absorbent body is at least on the center line extending along the longitudinal direction of the main body, and the pulp basis weight of the absorbent body is at least on the side and rear side thereof.
- the width of the low basis weight portion is 5 to 25% of the width of the absorbent body.
- a compressed groove is formed that is depressed toward the back sheet side, and the compressed groove includes a rearward compressed groove that is convex toward the rear and surrounds the rear end of the low basis weight portion.
- the low basis weight portion formed in the intergluteal cleft opposing area is easier to bend than the laterally outer part, so when a force is applied from the laterally outer side, the intergluteal cleft opposing area is bent more easily.
- the lateral center can easily swell toward the top sheet side, forming a mountain.
- the mountain formed by deforming the low basis weight portion has a size that easily enters the intergluteal cleft.
- the low basis weight portion is flexible even when bent in the longitudinal direction, it is easy to fit closely along the shape of the intergluteal cleft, and body fluids can be prevented from leaking along the intergluteal cleft, so-called leakage. Furthermore, since the low basis weight portion is a portion where the absorbent body is present, body fluids received in the low basis weight portion can be immediately absorbed. Therefore, it is more effective in preventing leakage than a configuration in which slits, through grooves, etc. are provided to promote deformation of the main body.
- the low basis weight portion is a portion where the pulp basis weight is lower than the rear portion thereof, that is, the low basis weight portion is a portion having a rear end in the middle of the absorbent body. Therefore, the mountain along the longitudinal direction formed by the swell of the low basis weight portion described above is suppressed from extending further to the rear. Therefore, the part behind the low basis weight part can be easily fitted to the rear part of the intergluteal cleft where the wearer's intergluteal cleft is shallow, or to the part behind the end position of the intergluteal cleft.
- a rear compression groove is formed so as to surround the rear end of the low basis weight portion.
- This rear compression groove enhances the effect of suppressing the rearward continuity of the above-mentioned mountain formed by the low basis weight portion at the rear of the low basis weight portion. Further, since the compression groove has the function of drawing in and retaining body fluid, the rear compression groove can prevent leakage further to the rear or obliquely rearward.
- the body fluid that has diffused backward in the low basis weight portion is easily drawn into the rear compression groove.
- Body fluid drawn into the rear compression groove is more likely to be guided in the extending direction of the rear compression groove, that is, more easily guided from the lateral direction to the direction along the front.
- the body fluid can be transferred to the rear. The effectiveness of preventing this will be improved.
- the compression groove further includes a pair of central compression grooves spaced apart from each other in the lateral direction, which are formed in front of the rear compression groove and spaced apart from each other in the longitudinal direction, and the low basis weight portion includes: It extends at least from a position between the rear ends of the pair of central compression grooves to a position between the front ends of the rear compression grooves.
- the pair of central compression grooves promotes deformation of the area in front of the area facing the intergluteal cleft, that is, the area facing the perineum or the body fluid outlet further forward, and also allows the body fluid to be deformed. It can be guided in the longitudinal direction. Since the low basis weight part is formed in an area where the pair of rear compressed grooves and the rear compressed groove are separated and the compressed grooves are discontinuous, the low basis weight part and its surrounding area are flexible. gender is ensured. Therefore, the above-mentioned effect that the low-density portion can be deformed to form a mountain rising toward the top sheet side and can also be flexibly curved in the longitudinal direction is enhanced.
- the ends (rear ends) of the pair of central compression grooves are arranged on the front side of the low basis weight part, and the ends (front ends) of the rear compression grooves are arranged on the rear side of the low basis weight part, so there are four compression grooves ( The swell of the low basis weight portions based on the ends (two in the front and two in the rear) is assisted.
- the rear compressed groove includes a horseshoe-shaped compressed groove surrounding the rear end of the low basis weight portion, and branches laterally outward from the horseshoe-shaped compressed groove and extends along the longitudinal direction. a pair of lateral compression grooves, and front ends of the pair of lateral compression grooves are located forward of the longitudinal center of the low basis weight portion.
- At least the region extending laterally in the rear half of the low basis weight portion is surrounded by the side compression grooves. Therefore, the body fluid that has diffused diagonally rearward from the low basis weight portion is blocked by the side compression grooves, and the leakage prevention effect can be enhanced.
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Abstract
Description
本実施形態による吸収性物品は、生理用ナプキン、おむつ、軽失禁用パッド等であってよいが、以下においては、夜用又は長時間用の生理用ナプキンを例に挙げて吸収性物品の基本構造について説明する。図1に、吸収性物品1の平面図を示す。また、図2に、図1のI-I線断面図を、図3に、図1のII-II線断面図を示す。
図4に、図1の吸収性物品1からトップシート3及びサイドシート7、7を取り外し、吸収体4を露出させた状態の平面図を示す。本形態では、図4に示すように、吸収体4の目付、具体的にはパルプ目付は全体的に均一ではなく、場所によって異なっている。例えば、吸収体4は、主として中程度のパルプ目付を有する中目付部4Mと、中目付部4Mよりもパルプ目付の高い高目付部4Hと、中目付部4Mよりもパルプ目付の低い低目付部4Lとを有する。さらに、低目付部4Lは、会陰対向領域Mに配され、吸収体4と同じ幅を有する前方低目付部4Lfと、臀裂対向領域B1の横方向D2の中央に配された細長の後方低目付部4Lbとを有する。前方低目付部4Lfと後方低目付部4Lbとは連続して形成されていることが好ましい。
図1~図3に示すように、本形態の吸収性物品1の本体8には、少なくともトップシート3及び吸収体4がトップシート3側から圧搾されてなる圧搾溝(フィットエンボスともいう)が形成されていてよい。圧搾溝は、体液を引き込んで保持する機能があるので、体液の拡散の阻止、或いは体液の誘導に寄与することができる。図示の例では、圧搾溝は、複数の圧搾溝を含んでいてよい(符号10、11、12、13で図示)。圧搾溝は、平面視で、吸収性物品1の長手方向中心線CLを対称線とする線対称に形成されていてよいが、必ずしも線対称でなくともよい。圧搾溝は、例えば、少なくともトップシート3及び吸収体4が積層されてなる積層体を、一対の加圧ロールの間に通過させることによって形成することができる。その場合、上記積層体のトップシート3側に凸状のロールが、吸収体4側に平坦なロールが配置されるようにして、両ロールによって挟むことで加圧できる。なお、圧搾溝は、低圧搾部と、当該低圧搾部内においてより高圧で圧搾された高圧搾部とを含んでいてよい。図面においては、高圧搾部は黒色で表示する。
付記1に係る態様は、肌側のトップシートと、前記肌側と反対側の非肌側のバックシートと、前記トップシートと前記バックシートとの間に配置された吸収体とを備える細長の本体を有し、装着時に装着者の臀裂に対向させる臀裂対向領域において、前記本体の長手方向に沿って延びる中心線上に、前記吸収体のパルプ目付が少なくともその側方及び後方のパルプ目付より低い、長手方向に細長の低目付部を有し、前記低目付部の幅が、前記吸収体の幅の5~25%であり、少なくとも前記トップシート及び前記吸収体に、前記トップシート側から前記バックシート側へ窪む圧搾溝が形成されており、当該圧搾溝が、前記低目付部の後端部を取り囲む後方に凸形状の後方圧搾溝を含む。
付記2に係る態様では、前記低目付部の後端部が、平面視で前記後方圧搾溝に接するか又は重なっている。
付記3に係る態様では、前記圧搾溝がさらに、前記後方圧搾溝の前方に長手方向に離隔して形成された、横方向に互いに離隔した一対の中央圧搾溝を含み、前記低目付部が、少なくとも、前記一対の中央圧搾溝の後端の間の位置から前記後方圧搾溝の前端の間の位置までにわたって延在する。
付記4に係る態様では、前記後方圧搾溝が、前記低目付部の後端部を取り囲む蹄鉄形状圧搾溝と、当該蹄鉄形状圧搾溝から横方向外側に分岐して長手方向に沿って延在する一対の側方圧搾溝とを含み、前記一対の側方圧搾溝の前端が、前記低目付部の長手方向の中央よりも前方に位置する。
2 バックシート
3 トップシート
4 吸収体
4H 吸収体の高目付部
4L 吸収体の低目付部
4Lf 前方低目付部
4Lb 後方低目付部(細長低目付部)
4M 吸収体の中目付部
7 サイドシート
8 本体(吸収性物品本体)
10 中央圧搾溝
10bt 中央圧搾溝の後端
11 第1後方圧搾溝
11ft 第1後方圧搾溝の前端
11s 側方圧搾溝
11st 側方圧搾溝の前端
11r 窪み部
11h 蹄鉄形状圧搾溝
12 第2後方圧搾溝
13 前方圧搾溝
B 臀部対向領域
B1 前方臀部対向領域(臀裂対向領域)
B2 後方臀部対向領域
C 体液排出口対向領域
CL 長手方向中心線
D1 長手方向
D2 横方向
F 前方領域
HF ヒップホールドフラップ
M 中間領域(会陰対向領域)
WF ウィングフラップ
Claims (4)
- 肌側のトップシートと、前記肌側と反対側の非肌側のバックシートと、前記トップシートと前記バックシートとの間に配置された吸収体とを備える細長の本体を有し、
装着時に装着者の臀裂に対向させる臀裂対向領域において、前記本体の長手方向に沿って延びる中心線上に、前記吸収体のパルプ目付が少なくともその側方及び後方のパルプ目付より低い、長手方向に細長の低目付部を有し、
前記低目付部の幅が、前記吸収体の幅の5~25%であり、
少なくとも前記トップシート及び前記吸収体に、前記トップシート側から前記バックシート側へ窪む圧搾溝が形成されており、当該圧搾溝が、前記低目付部の後端部を取り囲む後方に凸形状の後方圧搾溝を含む、吸収性物品。 - 前記低目付部の後端部が、平面視で前記後方圧搾溝に接するか又は重なっている、請求項1に記載の吸収性物品。
- 前記圧搾溝がさらに、前記後方圧搾溝の前方に長手方向に離隔して形成された、横方向に互いに離隔した一対の中央圧搾溝を含み、
前記低目付部が、少なくとも、前記一対の中央圧搾溝の後端の間の位置から前記後方圧搾溝の前端の間の位置までにわたって延在する、請求項1又は2に記載の吸収性物品。 - 前記後方圧搾溝が、前記低目付部の後端部を取り囲む蹄鉄形状圧搾溝と、当該蹄鉄形状圧搾溝から横方向外側に分岐して長手方向に沿って延在する一対の側方圧搾溝とを含み、
前記一対の側方圧搾溝の前端が、前記低目付部の長手方向の中央よりも前方に位置する、請求項1又は2に記載の吸収性物品。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009273724A (ja) * | 2008-05-15 | 2009-11-26 | Uni Charm Corp | 吸収性物品 |
JP2012050626A (ja) * | 2010-08-31 | 2012-03-15 | Unicharm Corp | 吸収性物品及び生理用ナプキン |
JP2016010633A (ja) * | 2014-06-30 | 2016-01-21 | ユニ・チャーム株式会社 | 吸収性物品 |
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Patent Citations (3)
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JP2009273724A (ja) * | 2008-05-15 | 2009-11-26 | Uni Charm Corp | 吸収性物品 |
JP2012050626A (ja) * | 2010-08-31 | 2012-03-15 | Unicharm Corp | 吸収性物品及び生理用ナプキン |
JP2016010633A (ja) * | 2014-06-30 | 2016-01-21 | ユニ・チャーム株式会社 | 吸収性物品 |
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