WO2020262415A1 - 吸収性物品 - Google Patents

吸収性物品 Download PDF

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Publication number
WO2020262415A1
WO2020262415A1 PCT/JP2020/024693 JP2020024693W WO2020262415A1 WO 2020262415 A1 WO2020262415 A1 WO 2020262415A1 JP 2020024693 W JP2020024693 W JP 2020024693W WO 2020262415 A1 WO2020262415 A1 WO 2020262415A1
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WO
WIPO (PCT)
Prior art keywords
layer absorber
upper layer
absorbent article
absorber
region
Prior art date
Application number
PCT/JP2020/024693
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
なるみ 山本
俊久 林
祥平 内田
直紀 渡子
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Priority to KR1020217042676A priority Critical patent/KR102478357B1/ko
Priority to TW109121597A priority patent/TWI826699B/zh
Priority to CN202080046068.7A priority patent/CN114040738B/zh
Publication of WO2020262415A1 publication Critical patent/WO2020262415A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • 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
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • 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
    • 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
    • A61F13/53—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
    • A61F13/537—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
    • A61F13/53708—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 characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F13/539—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium characterised by the connection of the absorbent layers with each other or with the outer layers
    • 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
    • A61F13/56—Supporting or fastening 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
    • A61F13/56—Supporting or fastening means
    • A61F13/5605—Supporting or fastening means specially adapted for sanitary napkins or the like
    • A61F13/5611—Supporting or fastening means specially adapted for sanitary napkins or the like using fastening strips, e.g. adhesive, on the undergarment-facing side
    • 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
    • A61F2013/4708—Panty-liner
    • 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
    • A61F2013/530481—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 superabsorbent materials, i.e. highly absorbent polymer gel materials
    • 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
    • A61F2013/53445—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 from several sheets

Definitions

  • the present invention relates to absorbent articles such as panty liners and light incontinence pads that are used by being attached to underwear.
  • the absorbent article of Patent Document 1 has a front surface sheet, a back surface sheet, and an absorbent core which is arranged between the front surface sheet and the back surface sheet and has a highly absorbent polymer.
  • the absorbent core of Patent Document 1 is mainly composed of a highly absorbent polymer, and the highly absorbent polymer is arranged over the entire plane of the absorbent core.
  • the absorbent core of Patent Document 1 is mainly composed of a highly absorbent polymer, and has excellent body fluid retention.
  • the highly absorbent polymer is arranged over the entire plane of the absorbent core, once the body fluid is absorbed, the highly absorbent polymer gels and gel blocking is likely to occur. When gel blocking occurs, it is difficult to continue to absorb the body fluid, and leakage may occur or the wearing feeling may be deteriorated due to the body fluid remaining on the surface.
  • the absorbent article is arranged in the longitudinal direction and the width direction orthogonal to each other, a liquid permeable front sheet, a liquid impermeable back sheet, and at least between the front surface sheet and the back surface sheet. It has an absorber having hydrophilic fibers and a highly absorbent polymer.
  • the absorber has at least an upper layer absorber having the hydrophilic fibers and a lower layer absorber arranged on the non-skin facing surface side of the upper layer absorber.
  • the lower layer absorber has an extension region extending in the longitudinal direction and the width direction from the upper layer absorber.
  • the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the upper layer absorber is smaller than the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the extension region.
  • the absorbent article is arranged in the longitudinal direction and the width direction orthogonal to each other, a liquid permeable front sheet, a liquid impermeable back sheet, and at least between the front surface sheet and the back surface sheet. It has a hydrophilic fiber and an absorber having a highly absorbent polymer.
  • the absorber has at least an upper layer absorber having the hydrophilic fibers and a lower layer absorber arranged on the non-skin facing surface side of the upper layer absorber.
  • the lower layer absorber has an extension region extending in the longitudinal direction and the width direction from the upper layer absorber.
  • the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the upper layer absorber is smaller than the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the extension region.
  • the upper layer absorber has hydrophilic fibers, and the hydrophilic fibers can rapidly draw in the body fluid.
  • the body fluid drawn by the upper layer absorber is guided to the lower layer absorber while diffusing in the upper layer absorber.
  • gel blocking on the skin-facing surface of the upper-layer absorber can be suppressed, and body fluid can be continuously drawn into the upper-layer absorber. it can.
  • the basis weight of the highly absorbent polymer in the extension region of the lower layer absorber is relatively large, and the body fluid that has exuded laterally from the upper layer absorber is retained by the highly absorbent polymer in the extension region to suppress lateral leakage. it can.
  • the extension area is offset outward from the center of the absorbent article from which the body fluid is drained. Therefore, even if gel blocking occurs due to the highly absorbent polymer in the extension region, the body fluid can be retained.
  • the upper layer absorber may be an air-laid nonwoven fabric containing the hydrophilic fibers and the highly absorbent polymer.
  • the air-laid non-woven fabric has a high liquid drawing property and a high liquid releasing property. Therefore, the body fluid discharged onto the upper layer absorber can be quickly drawn in, and the body fluid can be quickly guided to the lower layer absorber.
  • the air-laid non-woven fabric has high diffusivity in the plane direction, the body fluid drawn into the upper layer absorbing body can be diffused over a wide range. Therefore, the body fluid can be held in a wide area in the upper layer absorber, and the body fluid can be easily guided to the extending region of the lower layer absorber. Therefore, gel blocking due to local absorption of body fluid in the upper layer absorber can be suppressed.
  • the hydrophilic fibers are at least disposed on the surface on the lower absorber side, and the highly absorbent polymer is disposed on the surface on the lower absorber side. It may be arranged at least on the skin-facing surface side of the fiber.
  • the body fluid that could not be completely absorbed by the highly absorbent polymer of the upper layer absorber can be drawn in by the hydrophilic fibers located on the non-skin facing surface side of the highly absorbent polymer. By drawing the body fluid to the non-skin facing surface side in the upper layer absorber, the body fluid can be smoothly guided toward the lower layer absorber.
  • the absorber has heat-sealing fibers, and the heat-sealing fibers are arranged only in the lower-layer absorber among the upper-layer absorber and the lower-layer absorber. May be done.
  • the heat-sealing fiber is heated in the manufacturing process to form a heat-sealing portion.
  • the bonding force between the fibers becomes stronger, and the lower layer absorber is less likely to be twisted.
  • the entire absorbent article is less likely to be twisted, and can be kept appropriately arranged facing the body, so that leakage can be suppressed and discomfort can be suppressed.
  • the heat-sealing fibers are not arranged in the upper layer absorber, the heat-sealing portion is not formed in the upper layer absorber.
  • the swelling of the highly absorbent polymer is not hindered due to the strengthening of the bonding force between the fibers, the highly absorbent polymer is easily swelled, and the absorption performance can be maintained.
  • the extension region has a first region arranged on the upper layer absorber side and a second region arranged on the outer edge side of the absorbent article, and the first region.
  • the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the second region may be larger than the basis weight of the highly absorbent polymer exposed on the skin-facing surface of the second region.
  • the absorption joint portion is provided with an adhesive for joining the upper layer absorber and the lower layer absorber, and the absorption joint portion extends in one of the longitudinal direction and the width direction. Moreover, a plurality of them may be provided at intervals in the other side of the longitudinal direction and the width direction. Absorbent joints provided with an adhesive are less likely to allow body fluids to permeate, and non-absorbent joints without an adhesive are more likely to allow body fluids to permeate. According to this aspect, the body fluid absorbed by the upper layer absorber can be diffused in one direction at the non-absorption joint portion, which is the distance between the absorption joint portions, and the body fluid can be absorbed over a wide area.
  • the non-absorbent joint diffuses the body fluid, while the absorbent joints arranged on both sides of the non-absorbent junction can suppress the diffusion in the other direction. Due to the excessive diffusion of body fluid between the upper layer absorber and the lower layer absorber, it is possible to suppress the accumulation of fluid at the peeled portion between the upper layer absorber and the lower layer absorber, and to maintain the drawing of the body fluid toward the lower layer absorber side. ..
  • the upper layer absorber and the lower layer absorber have an absorption joint portion bonded by an adhesive, and the absorbent article is folded about a pair of folds extending in the width direction as a base point.
  • the upper layer absorber has an outer region arranged outside the crease in the longitudinal direction, and the absorption joint portion may be provided in a region that does not overlap the outer region.
  • the outer region of the upper absorber is not joined to the lower absorber and is easily moved during folding during the manufacturing process and unfolding during the mounting process. With the movement of the outer region, the highly absorbent polymer in the upper absorbent body is easily diffused, and the body fluid can be retained in a wide range of the absorbent body.
  • the absorption joint may be provided in a region that does not overlap the pair of creases.
  • the crease is formed more strongly, and the rigidity of the upper layer absorber in the region where the crease overlaps increases.
  • the crease does not overlap with the absorption joint portion, it is possible to suppress the local increase in the rigidity of the upper layer absorber.
  • the swelling of the highly absorbent polymer is not hindered due to the locally increased rigidity of the upper layer absorber, the highly absorbent polymer easily swells, and the absorption performance can be maintained.
  • an absorption joint portion in which the upper layer absorber and the lower layer absorber are bonded by an adhesive and an adhesive for joining the non-skin facing surface of the absorbent article to the worn article are provided.
  • a non-overlapping portion may be provided which has an adhesive portion and which does not overlap in the thickness direction of either the absorption joint portion or the adhesive portion. The non-overlapping portion does not overlap with either the absorption joint portion or the adhesive portion, and breathability and dryness can be ensured.
  • the absorbent article is a panty liner.
  • the absorbent article according to the present invention may be any absorbent article used by being attached to underwear, and may be, for example, a light incontinence pad.
  • FIG. 1 is a plan view of the absorbent article 1 according to the present embodiment as viewed from the skin-facing surface side.
  • FIG. 2 is a plan view of the absorbent article shown in FIG. 1 as viewed from the non-skin facing surface side.
  • FIG. 3 is a schematic cross-sectional view taken along the AA cross section of the absorbent article shown in FIG.
  • FIG. 4 is a schematic cross-sectional view taken along the BB cross section of the absorbent article shown in FIG.
  • the absorbent article 1 has a longitudinal direction L and a width direction W that are orthogonal to each other.
  • the longitudinal direction L is defined by the direction extending to the anterior side and the posterior side of the body.
  • the longitudinal direction L is the direction extending back and forth in the deployed absorbent article 1.
  • the absorbent article 1 has both the longitudinal direction L and the width direction W orthogonal to each other in the thickness direction T.
  • the thickness direction T extends to the skin facing surface side T1 facing the wearer side and the non-skin facing surface side T2 opposite to the skin facing surface side T1.
  • the absorbent article 1 has at least a front surface sheet 10, a back surface sheet 20, and an absorber 30.
  • the surface sheet 10 may be made of a liquid-permeable sheet such as a non-woven fabric or a perforated plastic film.
  • the surface sheet 10 may be configured by laminating a plurality of sheets, or may have a second sheet.
  • the surface sheet 10 may be composed of a laminated sheet of a cotton sheet containing cotton fibers and a sheet made of rayon and polyethylene, or the surface sheet 10 may be formed of the laminated sheet and a second sheet made of an air-through non-woven fabric. It may be configured.
  • the surface sheet 10 of the present embodiment is made of an air-through non-woven fabric.
  • a cotton sheet may be provided on the skin-facing surface side T1 of the air-through non-woven fabric. Since the cotton sheet touches the wearer's skin, the feel can be improved.
  • the back sheet 20 may be made of a liquid-impermeable sheet such as a plastic film.
  • the back sheet 20 may have breathability. According to the breathable back sheet 20, moisture is easily discharged to the outside of the absorbent article through the back sheet 20 when urine or sweat is absorbed. Therefore, it is possible to reduce stuffiness and improve the wearing feeling.
  • the front surface sheet 10 and the back surface sheet 20 reach the outer edge 1E of the absorbent article 1.
  • the outer edge is the outer edge in the width direction W
  • the front edge is the anterior edge
  • the trailing edge is the posterior edge.
  • the outer edge is the edge of the entire outer circumference including the outer edge, the front edge, and the trailing edge.
  • an adhesive portion 50 for joining the absorbent article 1 to the underwear is arranged on the non-skin facing surface of the back sheet 20.
  • the adhesive portion 50 is a portion provided with an adhesive material for joining the absorbent article 1 to the underwear.
  • a plurality of adhesive portions 50 extend in the width direction W and are provided at intervals in the longitudinal direction L.
  • the adhesive portion 50 does not have to reach the outer edge joint portion 40 described later. That is, the adhesive portion 50 and the outer edge joint portion 40 may be separated from each other in a plan view.
  • a portion is provided between the adhesive portion 50 and the outer edge joint portion 40, which is not bonded to the worn article (does not overlap the adhesive portion) and the sheets are not bonded to each other (does not overlap the outer edge joint portion 40).
  • the portion between the adhesive portion 50 and the outer edge joint portion 40 tends to become thicker when the highly absorbent polymer 32 expands. The swelling of the highly absorbent polymer is not hindered, the highly absorbent polymer easily swells, and the absorption performance can be maintained.
  • the outer edge joint 40 may be gripped when the absorbent article 1 is attached. Since the adhesive portion 50 does not reach the outer edge joint portion 40, even if the outer edge joint portion 40 is grasped at the time of mounting, it does not touch the adhesive portion 50 and can be easily attached to the worn article and easily removed from the worn article. In addition, the outer edge of the absorbent article 1 in the width direction when worn is arranged near the seam of the crotch portion of the worn article, and is easily deformed by the movement of the wearer. Since the adhesive portion 50 does not reach the outer edge joint portion 40, the side edge of the absorbent article does not directly follow the movement of the worn article, and the deformation of the absorbent article can be suppressed.
  • the adhesive portion 50 may be covered with a covering sheet (not shown) before use of the absorbent article.
  • a plurality of adhesive portions 50 may extend in the longitudinal direction L and may be provided at intervals in the width direction W, or may reach the outer edge joint portion 40.
  • the absorber 30 is arranged between the front surface sheet 10 and the back surface sheet 20.
  • the absorber 30 has at least hydrophilic fibers 31 and a highly absorbent polymer (SAP) 32.
  • SAP highly absorbent polymer
  • the absorbent article 1 of the present embodiment is used as a panty liner for a long period of time.
  • the fibers can absorb body fluids such as vaginal discharge and sweat, and the highly absorbent polymer 32 can also absorb body fluids due to light incontinence.
  • the absorber 30 will be described in detail later.
  • the absorbent article 1 may be folded with a pair of creases FL extending in the width direction W as a base point before use.
  • the pair of fold FLs includes a first fold FL and a second fold FL2 arranged at intervals in the longitudinal direction L from the first fold FL1.
  • At least the outer edge joining portion 40 to which the front surface sheet 10 and the back surface sheet 20 are joined may be provided along the outer edge 1E of the absorbent article 1. At least the front surface sheet 10 and the back surface sheet 20 may be bonded to the outer edge bonding portion 40, and the absorber 30 may also be bonded.
  • the outer edge joint 40 may reach the outer edge 1E of the absorbent article 1.
  • the outer edge joint 40 may be formed by any of heat welding, ultrasonic welding, and embossing. In the outer edge joint portion 40 of the present embodiment, the front surface sheet 10, the back surface sheet 20, and the lower layer absorber 36 described later are joined by embossing.
  • outer edge joint 40 by embossing is provided on the outer edge 1E of the absorbent article 1, even if the body fluid reaches the outer edge of the absorbent article 1, the body fluid is retained in the dense outer edge joint 40. , Side leakage can be suppressed. Further, when the outer edge of the outer edge joint 40 coincides with the outer edge of the absorbent article 1, a wider region inside the outer edge joint 40 (the region where the sheets and the lower layer absorber are not joined) can be secured. , It is possible to suppress hindering the expansion of the highly absorbent polymer 32.
  • the outer edge joint 40 is omitted in the cross-sectional views of FIGS. 3 and 4 for convenience, as shown in FIGS. 1 and 2.
  • the absorber 30 has an upper layer absorber 35 and a lower layer absorber 36 arranged on the non-skin facing surface side T2 of the upper layer absorber 35.
  • the area of the lower absorber 36 is larger than the area of the upper absorber 35.
  • the lower layer absorber 36 has an extension region R10 extending from the upper layer absorber 35 in a plan view.
  • the extension area R10 is a shaded area in FIG.
  • the lower layer absorber 36 is arranged on the entire absorbent article 1, and the outer edge of the lower layer absorber 36 coincides with the outer edge of the absorbent article.
  • the upper layer absorber 35 is rectangular in a plan view and straddles the center of the absorbent article 1 in the width direction W and the center in the longitudinal direction L.
  • the outer edge of the upper layer absorber 35 is located inside the outer edge of the absorbent article 1 in the width direction W. In the longitudinal direction L, the outer edge of the upper layer absorber 35 is located inside the outer edge of the absorbent article 1. Therefore, the extension region R10 is provided on the outside of the upper layer absorber 35 in the longitudinal direction L and on the outside of the upper layer absorber 35 in the width direction W, respectively. The extension region R10 is a region between the outer edge of the upper layer absorber 35 and the outer edge 1E of the absorbent article.
  • the extension region R10 may have a first region R11 arranged on the upper layer absorber 35 side and a second region R12 arranged on the outer edge side of the absorbent article.
  • the first region R11 is a region in which the extension region R10 is bisected in the longitudinal direction L or the width direction W and is arranged on the upper layer absorber 35 side.
  • the boundary between the first region R11 and the second region R12 is shown by a alternate long and short dash line.
  • the boundary between the first region R11 and the second region R12 in the present embodiment is a line connecting the outer edge of the upper layer absorber 35 and the middle point of the outer edge of the absorbent article 1.
  • the upper layer absorber 35 has at least hydrophilic fibers 31.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 is smaller than the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the extension region R10 of the lower layer absorber 36.
  • the skin-facing surface of the upper-layer absorber 35 and the skin-facing surface of the lower-layer absorber 36 are the surfaces of each absorber on the skin-facing surface side T1, and are surfaces toward the surface sheet. It is sufficient that the highly absorbent polymer 32 exposed on the skin facing surface of the extension region R10 of the lower layer absorber 36 is arranged more than the highly absorbent polymer 32 exposed on the skin facing surface of the upper layer absorber 35.
  • the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 may not be present. Further, the highly absorbent polymer 32 is not arranged in the upper layer absorber 35 and the lower layer absorber 36, and the highly absorbent polymer 32 is formed on the skin facing surface of the upper layer absorber 35 and on the skin facing surface of the lower layer absorber 36. It may be arranged. In the present embodiment, the highly absorbent polymer 32 is arranged in the upper layer absorber 35, and a part of the highly absorbent polymer 32 is exposed on the skin facing surface of the upper layer absorber 35.
  • the highly absorbent polymer 32 is not arranged in the lower layer absorber 36, and the highly absorbent polymer 32 spilled from the upper layer absorber 35 is exposed in the extension region R10 of the lower layer absorber 36.
  • the highly absorbent polymer 32 has high absorbency on the side edge of the absorber in order to prevent the highly absorbent polymer 32 from spilling from the outer edge 1E of the absorbent article 1. It is preferable that the polymer 32 is not arranged, and more preferably, the highly absorbent polymer 32 is not arranged in the lower layer absorber 36.
  • the highly absorbent polymer 32 When the highly absorbent polymer 32 is not arranged on the outer edge of the absorber 30 (the highly absorbent polymer 32 is arranged only in the central portion of the absorber), the water retention amount of the entire absorbent article is increased. In order to secure it, the highly absorbent polymer 32 may be arranged in the lower layer absorber 36. Further, in the present embodiment, the mass of the highly absorbent polymer 32 of the lower layer absorber 36 may be lower than the mass of the highly absorbent polymer 32 of the upper layer absorber 35.
  • the comparison of the basis weight of the high-absorbent polymer 32 is that the colored water is dripped and the high-absorbent polymer 32 of the upper layer absorber 35 and the high-absorbent polymer 32 of the extension region R10 have absorbed water, and the colors are different. Check visually. The region where the color per unit area is dark or the region where the color changes per unit area is large is defined as a region where the basis weight of the highly absorbent polymer 32 is large. As another method for comparing the basis weight of the highly absorbent polymer 32, the number of the highly absorbent polymer 32 expanded by the absorption of the colored water is measured by immersing the polymer in colored water for about 30 minutes. You can compare the basis weight.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 is not the basis weight of all the high-absorbent polymers 32 of the upper layer absorber 35, but on the skin-facing surface of the upper layer absorber 35. It is the basis weight of only the high-absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 without containing the unexposed high-absorbent polymer 32.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin facing surface of the extension region R10 of the lower layer absorber 36 does not include the highly absorbent polymer 32 not exposed on the skin facing surface of the lower layer absorber 36, and the lower layer. It is the basis weight of only the highly absorbent polymer 32 exposed on the skin-facing surface of the absorber 36.
  • the hydrophilic fiber 31 of the upper layer absorber 35 can quickly draw in the body fluid.
  • the body fluid drawn in by the upper layer absorber 35 is guided to the lower layer absorber 36 while diffusing in the upper layer absorber 35.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 is relatively small, gel blocking on the skin-facing surface of the upper layer absorber 35 can be suppressed, and the body fluid in the upper layer absorber 35. Can continue to be drawn in.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 is relatively large, the transfer of body fluid from the skin-facing surface of the upper layer absorber 35 to the non-skin surface side may be hindered. There is. However, since the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the upper layer absorber 35 is relatively small, the body fluid can continue to be drawn into the upper layer absorber 35, and the body fluid remains on the upper layer absorber 35. It is possible to suppress a feeling of strangeness and a feeling of foreign matter.
  • the high-absorptive polymer 32 in the extension region R10 of the lower layer absorber 36 has a relatively large basis weight, and the body fluid exuded laterally from the upper-layer absorber 35 is retained by the high-absorbent polymer 32 in the extension region R10.
  • lateral leakage can be suppressed.
  • the extension region R10 is offset outward from the center of the absorbent article 1 from which the body fluid is discharged. Therefore, even if gel blocking occurs due to the highly absorbent polymer 32 in the extension region R10, the body fluid can be continuously retained.
  • the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the first region R11 of the extension region R10 may be larger than the basis weight of the highly absorbent polymer 32 exposed on the skin-facing surface of the second region R12. .
  • the highly absorbent polymer 32 in the first region R11 has a relatively large basis weight, the body fluid can be more retained in the inner first region R11 in the plan view of the absorbent article 1. Body fluids are less likely to reach the outer edge 1E of the absorbent article 1, and lateral leakage can be suppressed.
  • the second region R12 abuts on a sweat-prone region away from the excretory portion. The second region R12 can reliably absorb sweat, which discharges less water than excrement. Further, since the basis weight of the highly absorbent polymer 32 in the second region R12 is low, it is possible to reduce the discomfort to the skin due to the unevenness when the highly absorbent polymer 32 expands.
  • the upper layer absorber 35 may be an air-laid non-woven fabric containing the hydrophilic fiber 31 and the highly absorbent polymer 32.
  • the air-laid non-woven fabric has a high liquid drawing property and a high liquid releasing property. Therefore, the body fluid discharged onto the upper layer absorber 35 can be quickly drawn in, and the body fluid can be quickly guided to the lower layer absorber 36. Further, since the air-laid non-woven fabric has high diffusivity in the plane direction, the body fluid drawn into the upper layer absorber 35 can be diffused in a wide range. Therefore, the body fluid can be held in a wide area in the upper layer absorber 35, and the body fluid can be easily guided to the extension region R10 of the lower layer absorber 36. Therefore, gel blocking due to local absorption of body fluid in the upper layer absorber 35 can be suppressed.
  • the outer edge of the lower layer absorber 36 may coincide with the outer edge of the absorbent article 1.
  • the area of the lower layer absorber 36 can be widened to secure the absorption capacity.
  • the highly absorbent polymer 32 exposed in the extension region R10 can retain the body fluid and prevent the body fluid from reaching the outer edge 1E of the absorbent article 1. That is, it is possible to suppress lateral leakage from the outer edge 1E of the absorbent article while ensuring the absorption capacity of the lower layer absorber 36.
  • the hydrophilic fibers 31 are at least arranged on the surface on the lower layer absorber 36 side, and the highly absorbent polymer 32 is more skin-facing than the hydrophilic fibers 31 arranged on the surface on the lower layer absorber 36 side. At least arranged on the surface side T1.
  • the body fluid that could not be completely absorbed by the highly absorbent polymer 32 of the upper layer absorber 35 can be drawn in and absorbed by the hydrophilic fibers 31 located on the non-skin facing surface side T2 of the high absorbent polymer 32. By drawing the body fluid into the non-skin facing surface side T2 in the upper layer absorber 35, the body fluid can be smoothly guided to the lower layer absorber 36.
  • the density of the highly absorbent polymer 32 in the absorber 30 may be constant or different.
  • the upper layer absorber 35 has a central region 35RC including the center in the thickness direction of the upper layer absorber 35 and a surface side region 35RS located outside the central region 35RC in the thickness direction. ..
  • the boundary between the central region 35RC and the surface side region 35RS is a boundary that divides the upper layer absorber 35 into three equal parts in the thickness direction.
  • the density of the highly absorbent polymer 32 in the central region 35RC may be higher than the density of the highly absorbent polymer 32 in the surface side region 35RS. Due to the high density of the highly absorbent polymer 32 in the central region 35RC, the central region 35RC tends to expand during absorption of body fluids.
  • the absorption capacity of body fluid can be secured.
  • the density of the highly absorbent polymer 32 in the surface side region 35RS is low, gel blocking is unlikely to occur during absorption of body fluid, and the attraction of body fluid can be maintained.
  • the absorber is cut along a cross section along the thickness direction, the cross section is photographed with an electron microscope, and the number of highly absorbent polymers 32 contained in the same area in each region is measured. , It can be measured as the density increases as the number increases.
  • the number of highly absorbent polymers 32 the number of highly absorbent polymers 32 expanded by the absorption of colored water is measured by immersing the polymer in colored water for about 30 minutes. The larger the number, the higher the density. Can be measured as increasing.
  • the absorber 30 may have heat-sealing fibers 33.
  • the heat-sealing fiber 33 may be arranged only in the lower layer absorber 36 among the upper layer absorber 35 and the lower layer absorber 36. That is, the heat-sealing fiber 33 does not have to be arranged in the upper layer absorber 35.
  • the heat-sealing fiber 33 is heated in the manufacturing process to form a heat-sealing portion. By forming the heat-sealed portion in the lower layer absorber 36, the bonding force between the fibers becomes stronger, and the lower layer absorber 36 becomes less likely to be twisted.
  • the entire absorbent article is less likely to be twisted, and can be appropriately arranged so as to face the body, so that leakage can be suppressed and discomfort can be suppressed.
  • the heat-sealing fiber 33 is not arranged in the upper layer absorber 35, the heat-sealing portion is not formed in the upper layer absorber 35.
  • the swelling of the highly absorbent polymer 32 is not hindered due to the increased bonding force between the fibers, the highly absorbent polymer 32 is likely to swell, and the absorption performance can be maintained.
  • the upper layer absorber 35 of the present embodiment is an air-laid non-woven fabric having a hydrophilic fiber 31, a binder (binding material), a hydrophilic agent, and a highly absorbent polymer 32, and the lower layer absorber 36 is a binder (binding material).
  • the air-laid non-woven fabric of the lower layer absorber 36 does not have the high-absorbent polymer 32, and the high-absorbent polymer 32 is arranged on the air-laid non-woven fabric.
  • the absorbent article 1 has an absorption joining portion 70 to which the upper layer absorber 35 and the lower layer absorber 36 are joined.
  • FIG. 5 is a plan view showing the absorption joint portion 70 of the upper layer absorber 35 and the lower layer absorber 36.
  • a plurality of absorption joints 70 may be provided so as to extend in one of the longitudinal direction L and the width direction W and at intervals in the other of the longitudinal direction L and the width direction W.
  • a plurality of absorption joints 70 of the present embodiment extend in the width direction W and may be provided at intervals in the longitudinal direction L.
  • the absorption joints 70 extend in the longitudinal direction L, and a plurality of absorption joints 70 may be provided at intervals in the width direction W.
  • the absorption joint portion 70 may extend in the same direction as the adhesive portion 50, and may be arranged at intervals in the same direction as the adhesive portion 50.
  • the absorption joint 70 provided with the adhesive is difficult to permeate the body fluid, and the non-absorbent joint 70 without the adhesive is easy to permeate the body fluid.
  • the non-absorbent joint portion is a portion other than the absorption joint portion 70.
  • the body fluid absorbed by the upper layer absorber 35 can be diffused in one direction at the non-absorbent joints at intervals between the absorption joints 70, and the body fluid can be absorbed over a wide area.
  • the non-absorbent joints diffuse the body fluid in the width direction W, while the absorption joints 70 arranged on both sides in the longitudinal direction L with respect to the non-absorbent joints can suppress the diffusion.
  • the absorption joint 70 may be provided in a region that does not overlap with the pair of creases FL of the absorbent article 1.
  • the crease is formed more strongly, and the rigidity of the upper layer absorber 35 in the region overlapping the crease FL increases.
  • the absorption joint 70 and the crease FL do not overlap with each other, it is possible to prevent the upper layer absorber 35 from being locally increased in rigidity.
  • the swelling of the highly absorbent polymer 32 is not hindered due to the locally increased rigidity of the upper layer absorber 35, the highly absorbent polymer 32 tends to swell, and the absorption performance can be maintained.
  • the upper layer absorber 35 may overlap with at least one of the pair of crease FLs. As shown in FIG. 5, the upper layer absorber 35 has an outer region R15 arranged outside the crease FL in the longitudinal direction L. In the present embodiment, one end of the upper layer absorber 35 in the longitudinal direction L is located outside the first fold FL1 in the longitudinal direction L, and the other end of the upper layer absorber 35 in the longitudinal direction L is the second fold FL2. Is consistent with. Therefore, the outer region R15 of the upper layer absorber 35 is provided outside the first fold FL1 in the longitudinal direction L. The outer region R15 is not joined to the lower layer absorber 36 and is easily moved during folding during the manufacturing process and unfolding during the mounting process. With the movement of the outer region R15, the highly absorbent polymer 32 in the upper layer absorber 35 is easily diffused, and the body fluid can be retained in a wide range of the absorber.
  • the absorbent article 1 is provided with a non-overlapping portion R20 in which neither the absorbing joint portion 70 nor the adhesive portion 50 overlaps in the thickness direction T.
  • the non-overlapping portion R20 does not overlap with either the absorption joint portion 70 or the adhesive portion 50, and air permeability and dryness can be ensured. It is possible to reduce the stuffiness of the entire absorbent article and improve the wearing feeling.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
PCT/JP2020/024693 2019-06-28 2020-06-24 吸収性物品 WO2020262415A1 (ja)

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CN114040738B (zh) 2023-04-21
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KR20220030220A (ko) 2022-03-10
TW202103665A (zh) 2021-02-01

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