CN108348366B - Absorbent article - Google Patents
Absorbent article Download PDFInfo
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- CN108348366B CN108348366B CN201680066908.XA CN201680066908A CN108348366B CN 108348366 B CN108348366 B CN 108348366B CN 201680066908 A CN201680066908 A CN 201680066908A CN 108348366 B CN108348366 B CN 108348366B
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- basis weight
- absorbent article
- flap
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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
- A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
- A61F13/4755—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means being a flat barrier on or inside the absorbent article, e.g. backsheet wrapped around the edges
-
- 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
- A61F13/45—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
- A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
- A61F13/4757—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction the means being located outside the perimeter of the absorbent core
-
- 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
- A61F13/476—Sanitary towels, incontinence pads or napkins characterised by encircling the crotch region of the undergarment
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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
- A61F13/51—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
- A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
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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
- A61F13/56—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
- A61F2013/4706—Sanitary towels, incontinence pads or napkins enlarged in the anal area
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Absorbent Articles And Supports Therefor (AREA)
Abstract
Provided is an absorbent article which can suppress the occurrence of leakage and the deterioration of wearing comfort by suppressing the accidental deformation of an absorber when the posture of a wearer repeatedly changes due to turning over or the like. The absorbent article has: an absorbent core (31) disposed in the crotch region and the rear region; and a hip flap (4). The absorbent core has: a 2 nd low basis weight portion (42) located at the widthwise center of the absorbent core in the rear region; and a high unit area weight portion (45) located further to the outside in the width direction than the 2 nd low unit area weight portion. An absorbent article (1) is provided with: a surface sheet (11) that covers the low basis weight section and the high basis weight section; and a flap (15) disposed on the hip flap. The outer edge (11OE) of the surface sheet is positioned further inward in the width direction than the inner edge (15IE) of the flap.
Description
Technical Field
The present invention relates to an absorbent article such as a sanitary napkin.
Background
Absorbent articles such as sanitary napkins are sometimes used in a state where a wearer lies down. When the absorbent article is used in a lying state, leakage after sitting is likely to occur. Therefore, an absorbent article having a hip flap for preventing back leakage is disclosed as an absorbent article such as a sanitary napkin (for example, see patent document 1).
The absorbent article of patent document 1 includes: a crotch region; a posterior region located posterior to the crotch region; an absorbent core disposed in the crotch region and the back region; and a hip flap extending outward in the width direction in the rear region from the outer edge of the absorbent core in the crotch region. The support layer is disposed on the hip flap. The support layer is disposed across the region where the absorbent core is disposed and the partial region of the hip flaps.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication 2008-520401
Disclosure of Invention
The hip flaps of the absorbent article of patent document 1 are arranged to cover the side portions of the hips of the wearer in a state in which the wearer lies. When the absorbent article is worn in this way, the body pressure from the hip portion side of either the right or left side may be concentrated on one side by turning over or the like. For example, when the body pressure from the right hip portion side increases due to the wearer turning over, the right absorbent core is pressed by the right hip portion and moves to the right side. In the absorbent article of patent document 1, a force is applied in a direction in which the support layer overlapping the absorbent core is moved to the right side in accordance with the movement of the absorbent core. However, the outer edge of the support layer of the absorbent article may be pressed by the buttocks and may not move to the right side, and the absorbent core may not move and may be compressed. If the absorbent core is repeatedly compressed, the absorbent core may be locally stiffened or the absorbent core may be locally distorted. As a result, the absorber may be deformed unexpectedly to cause leakage. Further, the surface of the absorbent article may become hard due to the hardening of the absorbent core portion, and the wearing feeling may be deteriorated.
The present disclosure has been made in view of the above-described problems, and an object of the present disclosure is to provide an absorbent article that can suppress the occurrence of leakage and the deterioration of wearing comfort by suppressing unexpected deformation of an absorber when the posture of a wearer repeatedly changes due to turning over or the like.
The disclosed absorbent article has: a front-rear direction (front-rear direction L) and a width direction (width direction W) orthogonal to each other; a crotch region (crotch region S1) disposed in the crotch of the wearer; a rear region (rear region S3) located on the rear side of the crotch region; an absorbent core (absorbent core 31) disposed in the crotch region and the back region; and a hip flap (hip flap 4) extending outward in the width direction from an outer edge of the absorbent core in the crotch region in the rear region, wherein the absorbent core has: a low unit area weight portion (2 nd low unit area weight portion 42) located at the widthwise center of the absorbent core at the back side region; and a high basis weight portion (high basis weight portion 45) located on the outer side in the width direction than the low basis weight portion, and having a higher basis weight than the low basis weight portion, the absorbent article including: a surface sheet (surface sheet 11) that covers the low basis weight part and the high basis weight part; and a flap (flap 15) disposed on the hip flap, wherein an outer edge (outer edge 11OE) of the surface sheet is positioned further inward in the width direction than an inner edge (inner edge 15IE) of the flap.
Drawings
Fig. 1 is a plan view of an absorbent article according to an embodiment.
Fig. 2 is a plan view of the absorbent article viewed from the side opposite to fig. 1.
Fig. 3 is a sectional view of the absorbent article taken along line a-a of fig. 1.
Fig. 4 is a schematic sectional view of the absorbent article in use, taken along the line a-a of fig. 1.
Detailed Description
Hereinafter, an absorbent article according to an embodiment will be described with reference to the drawings. The absorbent article may be any absorbent article such as a panty liner (panty liner), sanitary napkin, incontinence pad, or the like. In the following embodiments, a disposable sanitary napkin will be described as an example of an absorbent article.
In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. The drawings are schematic, and it should be noted that the scale of each dimension and the like are different from those in reality. Therefore, specific dimensions and the like should be determined with reference to the following description. The drawings also include portions having different dimensional relationships and ratios from each other.
(1) Unitary structure of absorbent article
Fig. 1 is a plan view of an absorbent article according to an embodiment. Fig. 2 is a plan view of the absorbent article viewed from the side opposite to fig. 1. Fig. 3 is a sectional view of the absorbent article taken along line a-a of fig. 1.
The absorbent article 1 has a front-back direction L, a width direction W, and a thickness direction T. The front-back direction L is a direction extending from the front side (ventral side) to the back side (dorsal side) of the wearer, or a direction extending from the back side to the front side of the wearer. The width direction W is a direction orthogonal to the front-rear direction L. The thickness direction T is a direction extending from the skin-facing surface side T1 of the wearer to the non-skin-facing surface side T2, and is a direction perpendicular to the front-back direction L and the width direction W. The skin-facing side T1 corresponds to a side facing the skin of the wearer when in use. The non-skin-facing surface side T2 corresponds to the side opposite to the skin-facing surface side T1 in use, i.e., the side facing away from the skin of the wearer.
The absorbent article 1 has a crotch region S1, a front region S2, and a back region S3. The crotch region S1 is a region opposite to the excretory opening (e.g., vaginal opening) of the wearer. When the absorbent article is worn in underwear, the crotch region S1 is located in the crotch portion of the underwear. That is, the crotch region is a region disposed under the crotch of the wearer, i.e., between the legs of the wearer.
The front region S2 is located more anteriorly than the crotch region S1. The front end edge of the front side region S2 defines the front end edge of the absorbent article 1. The rear region S3 is located more rearward than the crotch region S1. The rear end edge of the rear region S3 defines the rear end edge of the absorbent article 1. The length in the front-rear direction L of the rear region S3 may be longer than the length in the front-rear direction L of the crotch region S1.
The crotch region S1 may be provided with flaps 3 described later. In addition, the hip flaps 4 may be provided in the rear side region S3 so as to project outward in the width direction W.
The leading edge of each flap 3 is defined by the root of the flap 3 and corresponds to the portion located on the front side of the two portions recessed most inward in the width direction W. The front end edge of the side flap 3 may also define the boundary between the crotch region S1 and the front region S2. The rear end edge of the flap 3 is defined by the root of the flap 3 and corresponds to the portion located on the rear side of the two portions recessed most inward in the width direction W. The rear end edge of the side flap 3 may also define the boundary between the crotch region S1 and the rear region S3. Here, a region between the front end edge of the flap 3 and the rear end edge of the flap 3 in the front-rear direction L is referred to as a "flap region". In the absorbent article having side flaps, the crotch region S1 is substantially the same region as the side flap regions. Thus, it should be noted that in the present specification, the term "crotch region S1" can be referred to as "side flap region" instead.
The absorbent article 1 has a skin-facing sheet 10, a non-skin-facing sheet 20, and an absorber 30. The skin sheet 10 is provided on the skin-facing surface side T1 with respect to the absorber 30. The non-skin sheet 20 is provided on the non-skin facing surface side T2 with respect to the absorbent body 30. The absorber 30 is provided between the skin sheet 10 and the non-skin sheet 20.
The skin facing sheet 10 may have a surface sheet 11 and a side sheet 12. The top sheet 11 is a liquid-permeable sheet that is permeable to liquid such as body fluid. The top sheet 11 covers the central portion of the absorber 30 in the width direction W. The surface sheet 11 may extend from the front side region S2 to the rear side region S3 in the front-rear direction L.
The top sheet 11 is made of any sheet-like material having a liquid-permeable structure, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, or a mesh sheet. As the material of the woven fabric or the nonwoven fabric, any of natural fibers and chemical fibers can be used.
The side sheet 12 covers the outer edge of the front sheet 11 in the width direction W and extends outward in the width direction W than the front sheet 11. In the present embodiment, the absorbent article 1 has the side sheet 12, but the absorbent article 1 may not have the side sheet 12. In this case, the top sheet 11 may cover the entire absorbent body 30.
The side sheet 12 can be composed of the same material as the surface sheet 11. However, in order to prevent body fluid adhering to the top sheet 11 from passing over the side sheet 12 and leaking out to the outside of the absorbent article 1 in the width direction W, the side sheet 12 is preferably hydrophobic or water-repellent. The side sheet 12 may be disposed on the outer edge in the width direction W of the absorbent body 30, the side flaps 3, and the hip flaps 4.
The non-skin top sheet 20 is a liquid impermeable sheet. The non-skin surface sheet 20 may be a polyethylene sheet, a laminated nonwoven fabric mainly composed of polypropylene or the like, an air-permeable resin film, a sheet obtained by joining an air-permeable resin film to a nonwoven fabric such as spunbond or spunlace, or the like. The non-skin sheet 20 is disposed on the non-skin-facing surface side T2 of the absorber 30, and is disposed so as to straddle the side flaps 3 and the hip flaps 4. The non-skin surface sheet 20 constitutes a non-skin surface of the absorbent article 1. The sheet disposed on the non-skin-facing side of the absorbent body, the sheet disposed on the side flaps, and the sheet disposed on the hip flap may be integrated as in the present embodiment, or may be formed of separate sheets.
The absorber 30 is disposed at least in the crotch region S1 and the rear region S3. The absorber 30 may extend from the crotch region S1 to the front region S2. The absorber 30 has: an absorbent core 31 comprising an absorbent material for absorbing liquid; and a core wrap 32 for wrapping the absorbent core 31. The core wrap 32 may wrap the absorbent core 31 at least at a position closer to the skin-facing surface side than the absorbent core 31. As a specific example, the core package 32 may have: a 1 st core package 321 disposed on the skin-facing surface side of the absorbent core 31; and a 2 nd core package 322 disposed on the non-skin-facing surface side of the absorbent core 31. The 1 st core enclosure 321 and the 2 nd core enclosure 322 may also be composed of the same sheet. The absorbent material constituting the absorbent core 31 can be formed of, for example, hydrophilic fibers, pulp, and Super Absorbent Polymers (SAP). The core pack 32 can be made of, for example, nonwoven fabric or a tissue sheet. The core packet 32 may be hydrophobic. The core wrap 32 has hydrophobicity, and thus leakage resistance can be improved.
As described above, the absorbent article 1 has the side flaps 3 and the hip flaps 4. The side flaps 3 and the hip flaps 4 extend outward in the width direction W from the outer edge of the absorbent core 31 in the crotch region S1.
The side flaps 3 and hip flaps 4 may be formed by laminating side sheets 12, flaps 15 described later, and a non-skin surface sheet 20. The flaps 3 are configured to be foldable toward the non-skin surface sheet 20. The side flaps 3 are folded back toward the non-skin-facing surface side of the crotch portion of the underwear during use.
The hip flap 4 is located on the rear side of the side flap 3 and is provided in the rear region S3. The hip flaps 4 extend outward in the width direction from the outer edge of the absorbent core 31 in the crotch region S1. The region where the hip flaps 4 are arranged is located further outward in the width direction than the outer edge of the absorbent core 31 of the crotch region S1. The hip flaps 4 are not folded back during use, and are disposed between the underwear and the hips of the wearer. In the present embodiment, no absorbent material is provided on the hip flaps 4. Alternatively, the hip flaps 4 may be provided with an absorbent material.
The outer edge of the hip flap 4 is formed in an arc shape projecting outward in the width direction. The side edges of the hip flaps 4 may be formed in a wave shape having a large number of protrusions 4F. The large number of protrusions 4F preferably extend from the outer edge 4E of the hip panel 4 on one side to the outer edge of the hip panel 4 on the other side via the rear end edge of the rear region S3. Alternatively, the large number of protrusions 4F may be formed only on the outer edges of the pair of hip flaps 4. The width of each projection 4F is preferably 20mm or less, and more preferably 10mm or less. The width of each projection 4F is preferably 3mm or more.
Further, a plurality of concave portions between the convex portions 4F and the convex portions 4F are alternately formed on the side edges of the hip flaps 4. When a force is applied to the outer edge 4E of the hip flap 4 from the outside, a small amount of the convex portion 4F provided in the vicinity of the point of application of the force is folded back. However, since the convex portions 4F have a gap (concave portion) therebetween, a force applied to a certain convex portion 4F is hardly transmitted to an adjacent convex portion 4F. As a result, the hip flaps 4 are prevented from being curled greatly from the convex portions 4F to which a force is locally applied.
The "thickness" in the present specification is measured by the following measurement method.
When the absorbent article 1 is sealed in a package or the like, the absorbent article 1 is taken out of the package, and a sample that has been left in this state for 12 hours in an environment of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used.
In the measurement, the measurement is performed in a state where the absorbent article is not contracted but the stretchable member of the absorbent article is stretched. The thickness of the test piece was measured by using a dial gauge PEACOCK manufactured by Kawasaki corporation, using a gauge tip having a diameter of 10mm, and preparing a test piece having a size of 30mm × 30 mm. The measuring pressure of the measuring device on the test piece is adjusted to 3g/cm2. Here, the above measurement was performed for 10 samples in the respective states, and the average value thereof was taken as the length.
In addition, the measurement of "the weight and density per unit area of the absorbent core" in the present specification is performed by the following measurement method.
When the absorbent article 1 is sealed in a package or the like, the absorbent article 1 is taken out of the package, and a sample that has been left in this state for 12 hours in an environment of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used.
For an absorbent article wrapped in a package, the package is opened, the folded absorbent article is unfolded, and the thickness and area of a portion to be measured for weight and density per unit area are measured. Next, a portion to be measured for the weight per unit area and the density is cut out from the absorbent article, and the weight of the cut-out portion is measured. Next, the weight of the absorbent core was measured by removing the parts other than the absorbent core, such as the topsheet and the bag body, from the cut-out part. The weight per unit area is calculated from the weight of the absorbent core, the area of the portion where the weight per unit area and the density are to be measured. The density was calculated from the weight per unit area and the thickness.
In the present specification, the "length" is measured by the following measurement method.
When the absorbent article 1 is sealed in a package or the like, the absorbent article 1 is taken out of the package, and a sample that has been left in this state for 12 hours in an environment of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH is used.
Then, the length of the measurement target site in this state was measured along the measurement target site using an elastic tape (tape: glass fiber as a base material and polyvinyl chloride as a cover layer) manufactured by affinity measure. Here, the above measurement was performed for 10 samples in the respective states, and the average value thereof was taken as the length.
(2) Detailed structure of absorbent
Next, the structure of the absorbent member 30 will be described more specifically. The absorber 30 has a mid-height portion 33 at least in the crotch region S1. The medial plateau 33 may also extend from the crotch region S1 to the anterior region S2. The mid-height portion 33 is disposed across the center line CL in the crotch region S1. The center line CL is a line extending in the front-rear direction L through the center in the width direction of the absorbent article.
The middle high portion 33 is a region where the thickness of the absorbent core 31 is thicker than the thickness of the absorbent core 31 in the region around the middle high portion 33. The absorbent material of the middle height portion 33 may have a higher weight per unit area than the absorbent core 31 in the region other than the middle height portion 33 in the crotch region S1. The intermediate height portion 33 may be adjacent to the 1 st low basis weight portion 41 described later. Preferably, the absorbent core 31 on the rear side of the 1 st low basis weight portion 41 is thinner than the thickness of the middle high portion 33. More preferably, the entire absorbent core 31 of the back region S3 is thinner than the thickness of the middle-high section 33. The middle high portion 33 has a highest portion having the thickest thickness and an inclined portion connected to the highest portion. The inclined portions may be disposed between the highest portion and a front compression portion described later, and between the highest portion and the 1 st low basis weight portion 41.
The absorbent core 31 may have a 1 st low weight-per-unit-area portion 41, a 2 nd low weight-per-unit-area portion 42, and a 3 rd low weight-per-unit-area portion 43. Here, the "low basis weight portion" refers to a region constituted by the absorbent core 31 having a basis weight lower than the basis weight of the surrounding absorbent core 31, or a region not having the absorbent core 31. As described above, the "low basis weight portion" is a concept including a region of the absorbent core 31 having a weight per unit area of zero.
That is, the "low basis weight portion" may be a slit that penetrates the absorbent core 31 in the thickness direction T. The weight per unit area in the design of the slits is zero, but the slits may be regions where absorbent material is mixed from the surroundings. The length of the slit in the width direction W is preferably 1mm to 5 mm. For example, if the length of the slits in the width direction is less than 1mm, the absorbent may flow into the slits, and the base point of deformation of the absorbent core 31 may not be formed. Further, if the length of the slit in the width direction exceeds 5mm, the wearer may feel uncomfortable about the transmission leakage of the body fluid.
The weight per unit area of the absorbent core 31 of the low weight parts 41-43 is preferably 150g/m2Hereinafter, more preferably 100g/m2The following. Further, the basis weight of the absorbent core 31 of the low basis weight parts 41 to 43 is more preferably substantially 0g/m2. The basis weight of the absorbent core 31 in the low basis weight parts 41 to 43 is preferably 60% or less, more preferably 50% or less, of the basis weight of the absorbent core (excluding the middle height parts) around the low basis weight parts 41 to 43.
Even in the case where the "low basis weight portion" is a region having no absorbent core 31, the core wrap 32 may cover the entire absorbent core 31 across the low basis weight portion. In this case, even if the absorbent core 31 is divided into a plurality of regions, the absorbent body 30 is formed integrally by the core wrap 32.
The 1 st, 2 nd and 3 rd low basis weight portions 41, 42 and 43 serve as boundaries of the rigidity change of the absorber 30. Therefore, the 1 st, 2 nd and 3 rd low basis weight portions 41, 42 and 43 correspond to regions where the absorbent body 30 is easily deformed.
The 1 st low-basis weight portion 41 extends in the width direction W between the crotch region S1 and the rear region S3. The 1 st low area weight portion 41 may extend linearly in the width direction W or may extend curvilinearly in the width direction W.
The 1 st low basis weight portion 41 may be provided on the rear side of the center of the side flap 3 in the front-rear direction L and on the front side of the rear side edge of the absorbent body 30. The 1 st low basis weight portion 41 may be provided across the rear end edge of the side flap 3 in the front-rear direction L.
In the present embodiment, the 1 st low basis weight portion 41 has a curved shape in which the center of the 1 st low basis weight portion 41 in the width direction W protrudes rearward. More specifically, the center of the 1 st low basis weight portion 41 in the width direction W is located rearward of the outer edge of the 1 st low basis weight portion 41. The length of the 1 st low basis weight portion 41 in the front-rear direction L may be constant or may not be constant. The crotch region S1 located on the front side of the 1 st low basis weight portion 41 is sandwiched between the legs, and a twisting force is likely to be applied by the movement of the legs. Since the 1 st low basis weight portion 41 has a curved shape, the absorbent article 1 is likely to follow the body twist and release the deformation caused by the body movement.
Preferably, the 1 st low basis weight portion 41 has a length in the width direction W of 25mm or more. This can suppress the transmission of the motion of the absorber 30 in the crotch region S1 to the back region S3. More preferably, the 1 st low basis weight portion 41 extends from one end to the other end of the absorbent body 30 in the width direction W. In this case, the front end edge of the 1 st low unit area weight portion 41 may define the rear end edge of the crotch region S1, and the rear end edge of the 1 st low unit area weight portion 41 may define the front end edge of the rear region S3.
The 1 st low basis weight portion 41 extends from one end to the other end of the absorber 30 in the width direction W, and the absorbent material constituting the absorbent core 31 is less likely to move between the crotch region S1 and the back region S3. Therefore, local concentration of the absorbent material constituting the absorbent core 31 due to the movement during wearing can be further suppressed.
The length of the 1 st low basis weight portion 41 in the front-rear direction L is preferably 10mm or more and 50mm or less, and more preferably 10mm or more and 30mm or less, at the position of the center line CL of the absorbent article 1.
The absorbent article 1 of the embodiment has the 1 st low basis weight portion 41, and thus can be independently deformed in the crotch region S1 and the rear region S3. More specifically, the 1 st low basis weight portion has a length of 10mm or more and the 1 st low basis weight portion extends from one end to the other end, whereby the absorbent article can be deformed in directions other than the thickness direction even at the position of the 1 st low basis weight portion 41, and the crotch region S1 and the rear region S3 can be deformed independently without interfering with each other. As a result, even when various external forces are applied to the absorbent article 1 by the movement of the wearer such as in a lying posture or walking, the crotch region S1 and the rear region S3 deform independently, and the crotch region S1 and the rear region S3 can be continuously fitted to the shape of the body.
Since the mid-height portion 33 is provided in the crotch region S1, the fit in the crotch region S1 can be improved while ensuring the absorption performance in the crotch region S1. The absorbent article of one embodiment is capable of deforming the crotch region S1 along the body and causing the rear region S3 to follow the body in accordance with the motion of the body.
The 2 nd low basis weight portion 42 is located at the widthwise center of the absorbent core 31 in the rear side region S3. The 2 nd low basis weight portion 42 extends in the front-rear direction L along the centerline CL of the absorbent article in the rear region S3. The 2 nd low area weight portion 42 may extend linearly in the front-rear direction L. The 2 nd low area weight portion 42 is preferably connected to the 1 st low area weight portion 41.
The 1 st and 2 nd low basis weight portions 41 and 42 make it difficult for the absorbent material constituting the absorbent core 31 to move between the crotch region S1 (or the flap region), the right portion of the back region S3, and the left portion of the back region S3. This can suppress local concentration of the absorbent material constituting the absorbent core 31 due to the wearing motion. As a result, the wearer's uncomfortable feeling can be alleviated while wearing the absorbent article 1. Therefore, even in a lying posture in particular, the wearer hardly feels a sense of discomfort.
In the rear region S3, when the high basis weight portions 45, which are the side portions of the absorbent core 31, are pressed down by the buttocks on the left and right sides, the center in the width direction of the absorbent core 31 in the rear region S3 bulges toward the wearer side with the 2 nd low basis weight portion 42 as the apex. Thus, the 2 nd low basis weight portion 42 protrudes toward the skin side of the wearer when worn. The 2 nd low basis weight portion 42 extends in the front-rear direction L in the rear side region S3, and therefore is easily fitted along the wearer' S groin. Further, as described above, the absorbent article 1 is easily deformed independently in the crotch region S1 and the rear region S3 by the 1 st low basis weight portion 41. That is, the absorbent article 1 can be fitted to the shape of the body in both the crotch region S1 and the back region S3 by being independently deformed in the crotch region S1 and the back region S3.
The rear end edge of the 2 nd low area weight portion 42 may be located more rearward than the center in the front-rear direction of the rear region S3. The rear end edge of the 2 nd low basis weight portion 42 may be located rearward of the maximum width position P1 of the hip flap 4. The length of the 2 nd low basis weight portion 42 in the front-rear direction L is preferably 120mm or more, and more preferably 150mm or more. Preferably, the length of the 2 nd low basis weight portion 42 in the width direction W is 1mm or more and 5mm or less. In a cross section of the wearer's body along the front-rear direction L, the cleft between the buttocks (femoral cleft) is located in a region from a position posterior to the perineum to the coccyx. In use of the absorbent article, the 2 nd low basis weight portion 42 is disposed in the region of the wearer's groin.
The 3 rd low basis weight portion 43 extends outward in the width direction W from the 2 nd low basis weight portion 42 in the rear region S3. The 3 rd low unit area weight portion 43 may be connected to the 2 nd low unit area weight portion 42. The leading edge line of the 3 rd low basis weight portion 43 may extend substantially parallel to the width direction W on the inner side in the width direction W. Further, the leading edge line of the 3 rd low basis weight portion 43 may extend forward outside in the width direction W. The rear edge line of the 3 rd low basis weight portion 43 may be inclined forward as going from the inside to the outside in the width direction W. The 3 rd low basis weight portion 43 constitutes a width low basis weight portion.
Since the stiffness changes with the 3 rd low basis weight portion 43 as a boundary, the 3 rd low basis weight portion 43 serves as a deformation base point of the absorbent article 1. A deformation base point extending in the width direction is formed in the rear side region S3 of the absorbent article 1. Since the absorbent core 31 in the back region S3 can be deformed with the 3 rd low basis weight portion 43 as a base point, the absorbent article 1 can be more easily fitted along the roundness in the front-back direction L of the body. In particular, since the edge line of the rear side of the 3 rd low basis weight portion 43 is inclined forward as going from the inside to the outside in the width direction W, the absorbent article 1 is easily arranged along the roundness of the buttocks of the wearer.
The outer edge of the 3 rd low basis weight portion 43 in the width direction W is located inward of the outer edge of the absorbent core 31 in the back region S3. The 3 rd low basis weight portion 43 may be provided in plural at intervals in the front-rear direction L. The 3 rd low basis weight portion 43 constitutes the bent portion of the present embodiment. The 3 rd low basis weight portion 43 is configured to be able to bend the absorbent article 1 in the thickness direction. The "bent portion" may extend in the width direction, and may be parallel to the width direction or inclined with respect to the width direction. The "curved portion" may be a structure serving as a deformation base point of the absorbent core 31, and may be a low basis weight portion or a compressed portion obtained by compressing the absorbent core 31 in the thickness direction.
The absorbent core 31 has the high basis weight parts 45 located further outward in the width direction than the 2 nd low basis weight parts 42 in the rear side region S3. The high basis weight portion 45 has a lower basis weight of the absorbent material than the absorbent material of the absorbent core 31 around the high basis weight portion. The high basis weight portion 45 is a portion of the absorbent core 31 of the back region S3 excluding the 2 nd and 3 rd low basis weight portions 42 and 42. The 2 nd low unit area weight portion 42, the 3 rd low unit area weight portion 43, and the high unit area weight portion 45 are covered with the top sheet 11.
(3) Compression part
The absorbent article 1 has a compressed portion formed by compressing at least the absorbent core 31 in the thickness direction T. The compression section may have a front side compression section 81, a length compression section 82, and a pair of rear side compression sections 84.
The front compression unit 81 is provided at least in the crotch region S1. The front compression unit 81 may extend from the crotch region S1 to the front region S2. The front compression unit 81 may be formed by compressing the topsheet 11, the absorbent core 31, and the core pack 32 in the thickness direction T. The front compression unit 81 has sections extending in the front-rear direction L provided on both sides in the width direction W of the middle-high portion 33. The front compression section 81 may define the side edges in the width direction W of the middle high section 33.
The length-compressed part 82 is provided on both sides of the rear side region S3 with the center line CL therebetween, more specifically, with the 2 nd low basis weight part 42 therebetween. The length-compressed part 82 may be formed by compressing the absorbent member 30 and the top sheet 11 in the thickness direction.
In the rear region S3, when the high basis weight portions 45, which are the side portions of the absorbent core 31, are pressed down by the buttocks on both the left and right sides, the widthwise center of the absorbent body in the rear region S3 bulges toward the wearer side with the 2 nd low basis weight portion 42 as the apex. The length-compressed parts 82 are disposed on both sides of the 2 nd low basis weight part 42 in the width direction, and serve as deformation base points when the 2 nd low basis weight part 42 rises toward the wearer side. By providing the length-compressed parts 82, the convex deformation of the 2 nd low basis weight part 42 can be easily maintained, and the absorbent body 30 can be easily fitted to the gap between the buttocks of the wearer.
The length compression portion 82 extends in the front-rear direction L. The length compressing portion 82 may extend linearly along the front-rear direction L or may extend curvilinearly at an angle to the front-rear direction L. The length compressed part 82 may be formed at a position on the front side of the position P1 of the maximum width of the hip flap 4.
The front compression section 81 and the length compression section 82 may be separated in the front-rear direction. By separating the front compression section 81 and the length compression section 82, transmission of force to the crotch region S1 and the rear region S3 can be suppressed. Thus, the crotch region S1 and the rear region S3 are independently deformed, whereby the crotch region S1 and the rear region S3 can be fitted to the body in accordance with the shape of the body. As a modification, the front compression unit 81 and the length compression unit 82 may be connected continuously.
The pair of rear compression sections 84 are provided in the rear region S3 on both sides thereof with a center line CL therebetween. The rear compression section 84 may be formed by compressing the absorbent body 30 and the top sheet 11 in the thickness direction. The pair of rear side compressing portions 84 are provided so as to be separated from each other with a center line CL passing through the center of the absorbent article 1 in the width direction W. The pair of rear compressing portions 84 may be located on the rear side of the position P1 of the maximum width of the hip flaps 4.
The pair of rear compressing portions 84 are located on the rear side of the position P1 of the maximum width in the width direction of the hip flaps 4, and the pair of rear compressing portions 84 have a wide section in which the distance in the width direction increases as the distance goes to the rear side. The maximum width of the hip panel 4 in the width direction W is located more rearward than the center of the rear region S3 in the front-rear direction.
The wide region sandwiched by the wide zones corresponds to the vicinity of the sacrum of the wearer. There are no compression portions in this region, and a pair of rear compression portions 84 having high rigidity are present on both sides of this region. This maintains the wide region as a relatively flat surface. Since the relatively flat surface is in contact with the skin near the sacrum, the influence on the wearer's skin can be reduced. Further, since the wide region is maintained as a relatively flat surface, the convex deformation caused by the 2 nd low basis weight portion 42 located on the front side of the wide region can be made flat.
The pair of rear compression portions 84 are disposed so as to separate a region opposed to the vicinity of the sacrum from a portion opposed to a fleshy thickness portion of the buttocks. Since the buttocks move relatively vigorously, the portion of the absorbent article 1 facing the buttocks also tends to move in accordance with the movement of the wearer. The movement of the absorbent article 1 is less likely to be transmitted to the region facing the sacrum, that is, the wide region, by the pair of rear compression sections 84 having high rigidity. As a result, the wide region can be maintained as a relatively flat surface, and the influence on the skin of the wearer can be reduced. Further, it is preferable that the wide region is free from a high-rigidity compression portion. This can further alleviate the influence on the skin of the wearer.
The pair of length compressing units 82 is disposed separately from the pair of rear compressing units 84. This can suppress the movement of the absorbent core 31 behind the rear region S3 from following the movement of the absorbent core 31 in front of the rear region S3. In particular, the absorbent core 31 in front of the back region S3 may move to a large extent in accordance with the movement of the buttocks of the wearer. Even in this case, since the pair of longitudinal compressing sections 82 and the pair of rear compressing sections 84 are separated from each other, the operation of the absorbent core 31 behind the rear region S3 can be eased. Therefore, since the behavior of the absorbent core 31 in the wide region is alleviated, the stimulus given to the vicinity of the sacrum of the wearer can be reduced.
The absorbent article 1 may include a 1 st compressed part 85, a 2 nd compressed part 87, and a 3 rd compressed part 86 (see fig. 1) formed by pressure-bonding at least two of the sheets constituting the skin-facing sheet 10 and the non-skin-facing sheet 20 in the thickness direction T. The 1 st compressed part 85, the 2 nd compressed part 87 and the 3 rd compressed part 86 may be formed along the outer edge of the hip flap 4.
(4) Adhesive part
As shown in fig. 2, the absorbent article 1 is provided with an adhesive portion 60 having an adhesive for fixing the absorbent article 1 to the underwear S. The adhesive section 60 includes a 1 st main body adhesive section 61, a 2 nd main body adhesive section 62, a flap adhesive section 63, and a hip flap adhesive section 64. The adhesive sections 61-64 are provided on the non-skin-facing surface side of the non-skin surface sheet 20. The adhesive portions 61 to 64 may be covered with a release sheet before use. The release sheet prevents deterioration of the adhesive sections 61 to 64 before use. The release sheet is removed by the wearer at the time of use.
The 1 st main body bonding portion 61 is disposed forward of the 2 nd main body bonding portion 62. The 1 st and 2 nd body bonding portions 61 and 62 extend in the front-rear direction L. The 1 st body bonding portion 61 is disposed apart from the 2 nd body bonding portion 62 in the front-rear direction L. The 1 st body adhesive part 61 may be disposed on the front side of the 1 st low basis weight part 41 across the crotch region S1 and the front region S2. The 2 nd main body adhesive portion 62 is disposed in the rear region S3 at a position rearward of the 1 st low basis weight portion 41. The 1 st and 2 nd body bonding portions 61 and 62 are preferably not provided on the center line CL. The flap adhesive portion 63 is provided on the flap 3. The hip flap attachment portion 64 is provided to the hip flap 4.
Preferably, the 1 st low basis weight portion 41 is disposed in a region not overlapping with the adhesive portions 61 to 64 in the thickness direction T. More specifically, the 1 st low-basis-weight portion 41 is provided in a region between the 1 st body bonding portion 61 and the 2 nd body bonding portion 62.
The adhesive portion 60 may be disposed in a region overlapping the front sheet 11. The 2 nd main body adhesive part 62 of the present embodiment is disposed in a region overlapping the top sheet 11.
The adhesive portion 60 may not be disposed in a region overlapping with the 2 nd low basis weight portion 42. The 2 nd low basis weight portion 42 is not fixed to underwear, and is likely to deform following the movement of the body when the absorbent article 1 deforms. The second low basis weight portion 42 is flexibly deformed, whereby the skin-facing surface of the absorbent article 1 can be flexibly deformed, and the softness of the skin-facing surface of the absorbent article can be easily maintained.
In the absorbent article 1 according to one embodiment, the adhesive section 60 is not disposed in the region where the 2 nd low basis weight section 42 is disposed, and the adhesive section 60 is disposed in the region where the high basis weight section 45 having higher rigidity than the 2 nd low basis weight section 42 is disposed. The adhesive portion 60 is not disposed in the cushion region B described later, and the adhesive portion 60 is disposed in a region where the high basis weight portion 45 having higher rigidity than the cushion region B is disposed. The region with high rigidity can receive a force from the underwear via the adhesive portion 60. On the other hand, the adhesive section 60 is not disposed in the region with low rigidity, and can be flexibly deformed without receiving a force from the underwear.
The 2 nd low basis weight part 42 is preferably disposed in a region not overlapping with the adhesive parts 61 to 64 in the thickness direction T. More specifically, the 2 nd low basis weight portion 42 is provided between the plurality of 2 nd body bonding portions 62.
(5) Wing panel
Next, the fin 15 will be described. The flap 15 is disposed across the crotch region S1, the front region S2, and the rear region S3. The flap 15 is disposed on the side flap 3 and the hip flap 4. The flap 15 may be disposed at least in the rear region S3. The flap 15 may be disposed at least on the hip flap 4.
The flaps 15 are disposed between the side sheet 12 and the non-skin surface sheet 20 in the thickness direction T. The outer edge 15OE of the flap 15 is located at the outer edge of the hip flap 4. The outer circumferential shape of the widthwise outer side of the fin 15 is a circular arc shape that protrudes outward in the widthwise direction. The inner edge 15IE of the flap 15 is disposed at a position further outward in the width direction than the outer edge 11OE of the surface sheet 11. The outer peripheral shape of the inner side in the width direction of the fin 15 is a linear shape extending along the front-rear direction L.
The flap 15 is made of any sheet-like material having a liquid-impermeable structure, such as a nonwoven fabric, a woven fabric, a perforated plastic sheet, or a mesh sheet. The fins 15 of the present embodiment use a hydrophilic air-through nonwoven fabric. By using such a bulky nonwoven fabric as the flaps, the difference in thickness between the region where the flaps 15 are arranged and the absorbent body 30 can be reduced. When the region where the flap 15 is arranged comes into contact with the buttocks, the feeling of presence of the buttocks flap 4 can be generated, and a feeling of security such that the buttocks are wrapped when the wearer wears the diaper can be given.
As shown in fig. 3, the fins 15 and the surface sheet 11 are arranged apart in the width direction W. The region where the flap 15 is disposed is formed by stacking the side sheet 12, the flap 15, and the non-skin surface sheet 20, and has 3 layers of sheets. In the hip flap 4, the region where the front sheet 11 is disposed (the region where the front sheet 11 is disposed at the outer side in the width direction of the absorbent core 31) is formed by laminating the side sheet 12, the front sheet 11, and the non-skin surface sheet 20, and has 3 layers of sheets. The region located on the outer side in the width direction from the outer edge 11OE of the surface sheet 11 and on the inner side in the width direction from the flaps 15 includes the side sheet 12 and the non-skin surface sheet 20, and includes two layers of sheets. The number of layers of the region located on the outer side in the width direction from the outer edge 11OE of the surface sheet 11 and on the inner side in the width direction from the flaps 15 is smaller than the number of layers of the region where the flaps 15 are arranged, and is smaller than the number of layers of the region where the surface sheet 11 is arranged in the hip flaps 4.
The thickness of the region between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the fin 15 is smaller than the thickness of the region on the inner side in the width direction than the outer edge 11OE of the surface sheet 11, and is smaller than the thickness of the region on the outer side in the width direction than the inner edge 15IE of the fin 15. In the present embodiment, the thickness of the region inward in the width direction of the outer edge 11OE of the surface sheet 11 is 3.5mm to 4.5 mm. The thickness of the region outside the inner edge 15IE of the flap 15 in the width direction is 1.0mm to 2.0 mm. The thickness of the area between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the airfoil 15 is less than 1.0 mm. The region located on the outer side in the width direction from the outer edge 11OE of the surface sheet 11 and on the inner side in the width direction from the inner edge 15IE of the flap 15 is a region between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the flap 15.
The area between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the fin 15 has a smaller number of layers and lower rigidity than the area adjacent thereto in the width direction W. Thus, the region between the outer edge 11OE of the topsheet 11 and the inner edge 15IE of the flap 15 is more likely to deform than the adjacent region when the absorbent article 1 deforms, and functions as a buffer region B for absorbing deformation. In the following description, the buffer area B is defined as an area between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the fin 15. The front end edge of the cushion region B coincides with the front end edge of the flap 15. The rear end edge of the cushion region B coincides with the rear end edge of the flap 15.
The adhesive portion 60 may not be disposed in the buffer region B. The adhesive portion 60 may be disposed in a region overlapping the tab 15. The hip flap bonding portion 64 of the present embodiment is disposed in a region overlapping the flap 15.
The fins 15 are disposed on the flaps 3. The side flap 3 is formed by stacking 3 layers of a side sheet 12, a flap 15, and a non-skin surface sheet 20. Since the rigidity of the flaps 3 is increased by the flaps 15, the side edges of the flaps 3 can be prevented from being twisted. Thus, when the side flaps 3 are folded back toward the non-skin surface side of underwear during wearing, or when the side flaps 3 are sandwiched between legs during wearing, the side flaps 3 can be prevented from being twisted or bent.
(6) Absorbent article in wear
Next, the shape of the absorbent article 1 being worn will be described with reference to fig. 4. Fig. 4 is a schematic sectional view taken along line a-a of fig. 1 of the wearer in a supine position. Fig. 4 (a) to 4 (C) show a mode in which the posture of the wearer is changed by turning over while lying down. Fig. 4 (a) shows a state in which the weight of the body is uniformly applied to the left and right buttocks when the wearer lies on his back. Fig. 4 (B) shows a state in which the body weight is applied to the right buttocks more than to the left buttocks during turning over. Fig. 4 (C) shows a state in which a greater body weight is applied to the right buttocks when the wearer lies on the side after the completion of turning over than in the state shown in fig. 4 (B). In fig. 4, a line indicating the shape of the wearer's body is shown by a two-dot chain line. In fig. 4, a floor surface G of bedding or the like for supporting the body of the wearer is shown by a one-dot chain line.
The crotch region S1 of the absorbent article 1 is disposed so as to face the crotch of the wearer, and the rear region S3 of the absorbent article 1 is disposed so as to face the buttocks of the wearer. The absorbent core 31 of the back region S3 is pressed by the buttocks of the wearer in a state where the wearer lies on the back (the state shown in fig. 4 a). More specifically, the center in the width direction of the absorbent core 31 in the back region S3 is positioned between the bulges of the buttocks on the left and right sides, and the body pressure is applied to a small amount. On the other hand, the outer edge of the absorbent core 31 in the rear region S3 is in contact with the bulges of the buttocks on the left and right sides, and the body pressure is applied more. When the body pressure is applied to the high basis weight portion 45 located at the outer edge of the absorbent core 31 in the rear region S3, the absorbent core 31 deforms so as to bulge toward the wearer side with the 2 nd low basis weight portion 42 as a base point, and is disposed along the concavity between the left hip and the right hip (see fig. 4 a).
In a state where the absorbent article 1 is worn in this way, the posture may be changed by turning over or the like. For example, as shown in fig. 4 (B), the body of the wearer may be moved so that the right side of the body of the wearer is lower than the left side. When the wearer moves from fig. 4 (a) to fig. 4 (B), the wearer performs a body twisting motion. Specifically, the right leg and the right hip of the wearer rotate and move to the right side in such a manner that the right side face is directed downward. On the other hand, the left leg and the left hip of the wearer first keep the left leg in contact with the ground G, and the left hip is lifted from the ground G. Thereafter, the left leg moves so as to follow the left hip and rise from the ground.
When the posture of the wearer changes and the wearer is in the state shown in fig. 4 (B), the right hip portion is deformed so as to be squashed. The right high unit area weight portion 45 is pressed by the right hip portion and moves to the right (see arrow X in fig. 4B). The stiffness of the cushion region B is lower than the stiffness of the region on the inner side in the width direction than the outer edge 11OE of the surface sheet 11, and lower than the stiffness of the region on the outer side in the width direction than the inner edge 15IE of the flap 15. Thus, when the high basis weight portion 45 moves to the right, the buffer region B deforms. At this time, the outer edge of the cushion area B (the inner edge 15IE of the flap 15) hardly moves outward in the width direction, and the inner edge of the cushion area B (the outer edge 11OE of the surface sheet 11) moves outward in the width direction. The cushioning region B is narrowed, and deformation (movement of the high basis weight portion) of the absorbent core 31 is absorbed by the cushioning region B.
When the state shown in fig. 4 (B) is changed to a state in which the right side of the body of the wearer is lower than the left side, the state shown in fig. 4 (C) is obtained. The wearer's body is in a lateral position. The outer edge 15OE of the flap 15 is pressed by the right hip and cannot move in the width direction. Thus, when the high basis weight portion 45 moves to the right, the buffer region B deforms. The buffer region B is further narrowed, and the movement of the high basis weight portion 45 is absorbed by the buffer region B.
(7) Action and Effect
According to one embodiment, the absorbent article 1 is provided with a bumper zone B at the hip flaps 4. The absorbent article 1 can absorb the deformation of the absorbent core 31 by the buffering region B. The cushioning region B is lower in rigidity than the region where the surface sheet 11 is arranged, and is lower in rigidity than the region where the fins 15 are arranged. Thus, when the high basis weight portion 45 moves outward in the width direction, the buffer region B can absorb the movement of the high basis weight portion 45 in the width direction W. For example, in a structure without the buffer region B, if the high basis weight portion 45 attempts to move outward in the width direction, the high basis weight portion 45 may contact another member. The high basis weight portion 45 is compressed by contact with another member, and is partially hardened or partially twisted.
However, since the movement of the high basis weight portion 45 can be absorbed by the cushion region B, repeated compression of the absorbent core 31 can be suppressed, and the absorbent core 31 can be prevented from being partially hardened or the absorbent core 31 can be prevented from being partially twisted. The occurrence of leakage due to deformation of the absorbent core 31 can be suppressed. When the absorbent core 31 becomes hard, the skin-facing surface of the absorbent article 1 may become hard, and the wearing feeling may deteriorate. However, according to the absorbent article 1 of the embodiment, even after repeated turning over a plurality of times, the absorbent core 31 portion is suppressed from becoming hard, and the softness of the skin-facing surface of the absorbent article 1 can be maintained. This allows the wearer to continuously feel the softness of the absorbent article 1 even when the absorbent article 1 is worn overnight, and thus, the wearer can feel soft and comfortable as if he forgets to wear the absorbent article 1.
As described above, when the wearer changes his/her posture by turning over, the wearer performs a body twisting motion. This applies a force in the twisting direction to the absorbent article 1. For example, when the absorbent core 31 is twisted, the absorbent core 31 may move in the direction of application of the force, and the absorbent core 31 may become hard or the absorbent core 31 may bend. In the absorbent article 1 according to the embodiment, the 2 nd low basis weight portion 42 is provided at the center in the width direction of the absorbent core 31, and therefore the actions of the absorbent core 31 on both sides in the width direction across the 2 nd low basis weight portion 42 are easily separated. Thus, even when a force in the twisting direction acts on the absorbent article 1, the absorbent core 31 on the right side of the 2 nd lower basis weight portion 42 and the absorbent core 31 on the left side of the 2 nd lower basis weight portion 42 can operate independently and are less likely to be interlocked with each other. In addition, in the absorbent core 31, the high basis weight portions 45 of the absorbent core 31 which are easily operated by the buffer regions B disposed on both sides in the width direction of the absorbent core 31 are sandwiched between the 2 nd low basis weight portion 42 and the buffer regions B, and therefore the high basis weight portions 45 on both the left and right sides are easily independently operated. For example, even in a state where the hip of the wearer is placed on the high basis weight portion 45 on one side, the high basis weight portion 45 has a space for movement in the width direction W and can follow the movement in the twisting direction. Thus, even when a twisting force acts on the absorbent article 1 due to a change in the posture of the wearer, the absorbent core 31 can be deformed to follow the movement of the body while suppressing unintended deformation or deflection (twisting) of the absorbent core 31.
The adhesive portion 60 may not be disposed in the region (cushion region B) between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the flap 15 in the hip flap 4. The force applied from the underpants to the absorbent article 1 is transmitted through the adhesive portion 60 for fixing the underpants and the absorbent article 1. The cushion region B is not fixed to underwear by the adhesive section 60, and is easily deformed following the movement of the body when the absorbent article 1 is deformed. This makes it easy to absorb the movement of the absorbent core and the like by the cushion region B, and further suppresses the portion of the absorbent core 31 from becoming hard and the portion of the absorbent core 31 from being twisted.
The adhesive portion 60 may be disposed in a region overlapping the tab 15. The adhesive section 60 is disposed so as to overlap the flaps 15, whereby the region where the flaps 15 are disposed can be fixed to underwear. For example, when the region where the flaps 15 are arranged also moves outward in the width direction together with the absorbent core 31 when the wearer turns over, the position of the entire absorbent article may shift, and side leakage may occur. However, the region where the flap 15 is disposed is fixed to underwear and continuously fits along the body of the wearer. This allows the region on the outer side in the width direction of the cushion region B to be along the body, and the region on the inner side in the width direction of the cushion region B and the cushion region B to be deformed in accordance with the movement of the body. This can suppress the accidental deformation of the absorbent core 31 and the accompanying twisting of the absorbent core 31.
The 2 nd low basis weight portion 42 may be a slit that penetrates the absorbent core 31 in the thickness direction T of the absorbent article 1. Since the 2 nd low basis weight portion 42 is a slit, when a body pressure is applied to the high basis weight portion 45, the deformation is more likely to occur with the 2 nd low basis weight portion 42 as a base point than in a structure in which an absorbent is disposed in the 2 nd low basis weight portion 42. This facilitates the absorbent core 31 to be disposed along the depression between the left hip and the right hip. The absorbent core 31 is more likely to follow the body's motion and can suppress leakage of body fluid.
Further, since the 2 nd low basis weight portion 42 is a slit, the absorbent core 31 can be flexibly deformed, and the softness of the skin-facing surface of the absorbent article 1 can be maintained. Further, since the 2 nd low basis weight portion 42 is a slit, the actions of the absorbent core 31 positioned on both sides in the width direction via the 2 nd low basis weight portion 42 can be divided. Thereby, the right absorbent core 31 and the left absorbent core 31 can be moved independently without interlocking with each other. Even when a force in the twisting direction acts on the absorbent article 1, the forces applied to the left and right absorbent cores 31 are separated in the 2 nd low basis weight section 42, and the left and right absorbent cores are independently moved, thereby preventing twisting of the absorbent cores 31 due to twisting. Further, since the absorbent core 31 is less likely to be twisted, it is easier to maintain the shape along the depressions of the body (buttocks). The discomfort is less likely to occur, and the softness to the skin and the wearing comfort can be maintained.
The outer edge 15OE of the flap 15 may be located at the outer edge of the hip flap 4. For example, if the outer edges of the flaps 15 are positioned further inward in the width direction than the outer edges of the hip flaps 4, the rigidity of the outer edges of the hip flaps 4 decreases, and the outer edges of the hip flaps 4 may be distorted due to deformation of the hips, thereby causing side leakage. However, since the rigidity of the outer edge of the hip flap 4 can be increased by the flap 15, the region from the outer edge of the hip flap 4 to the cushion region B is likely to continuously follow the body. Therefore, it is possible to suppress side leakage and suppress unexpected deformation of the absorbent core 31 by deformation of the buffer region B.
When the outer edge 15OE of the flap 15 is located inward in the width direction from the outer edge of the hip flap 4, a difference in rigidity occurs between the region where the flap 15 is disposed (the region inward in the width direction from the outer edge 15OE of the flap 15) and the region where the flap 15 is not disposed (the region between the outer edge 15OE of the flap 15 and the outer edge of the hip flap 4). If the rigidity difference occurs in the hip flap 4, the side edges of the hip flap 4 may be curled with the portion where the rigidity difference occurs as a base point. By positioning the outer edge 15OE of the flap 15 at the outer edge of the hip flap 4, the difference in rigidity of the hip flap 4 can be reduced, and curling due to the difference in rigidity of the hip flap 4 can be prevented.
A 3 rd low unit area weight portion 43 extending in the width direction W may be provided at a position further outward in the width direction than the 2 nd low unit area weight portion 42, and the 3 rd low unit area weight portion 43 may constitute a bent portion. A deformation base point extending in the width direction W is formed by the 3 rd low basis weight portion 43 as a curved portion. Since the 3 rd low basis weight portion 43 is formed in plurality at intervals in the front-rear direction L, a plurality of deformation base points are formed in the rear side region S3 at intervals in the front-rear direction. The buttocks of the wearer are in contact with the rear region S3, and when the lying wearer rises, a force that expands and contracts in the front-rear direction L in accordance with the expansion and contraction of the skin of the buttocks is applied to the rear region S3. The absorbent core 31 of the back region S3 is stretched in the front-back direction L, or moved along the front-back direction L, or compressed in the front-back direction L. At this time, the 3 rd low basis weight portion 43 functions as a cushioning region for the operation of the absorbent core 31. The 3 rd low basis weight portion 43 can suppress distortion due to expansion and contraction of the absorbent core 31, and the like, and can keep the absorbent core 31 continuously attached to the body, thereby facilitating maintenance of a state in which discomfort is suppressed.
Further, by forming the plurality of 3 rd low basis weight portions 43 with a space in the front-rear direction, the absorbent core 31 in the back region S3 can be deformed at a plurality of base points with a space in the front-rear direction, and the absorbent core 31 in the back region S3 can be easily deformed along the roundness of the body (buttocks). This makes the absorbent core 31 more fit to the body and suppresses leakage of body fluid.
The thickness of the region (cushion region B) between the outer edge 11OE of the surface sheet 11 and the inner edge 15IE of the flap 15 may be smaller than the thickness of the region on the inner side in the width direction than the outer edge 11OE of the surface sheet 11, and may be smaller than the thickness of the region on the outer side in the width direction than the inner edge 15IE of the flap 15. The cushioning region B is thin and easily deformed. Therefore, when the high basis weight portion 45 is moved outward in the width direction by turning over or the like, the cushion region B can easily absorb the movement of the high basis weight portion 45, and the accidental deformation of the absorbent body 30 can be effectively suppressed.
The 2 nd low area weight portion 42 may be disposed on a virtual line extending in the width direction W from a position P1 of the maximum width of the hip flap 4. The 2 nd low area weight portion 42 is disposed so as to straddle the rear from the position forward of the maximum width position of the hip flap 4. The position of the maximum width of the hip flaps 4 is longest in the length in the width direction W in the absorbent article 1, and it is easy to release a force when the force is applied to the absorbent article 1. The 2 nd low unit area weight portion 42 is disposed across an imaginary line extending in the width direction W from the position P1 of the maximum width of the hip flap 4, and when a force in the twist direction is applied to the absorbent article 1, the force can be released over a large surface, and the twist of the hip flap 4 can be prevented.
The 3 rd low unit area weight portion 43 as the width low unit area weight portion may be disposed on a virtual line extending in the width direction from the position P1 of the maximum width of the hip flap 4. The 3 rd low unit area weight portion 43 is disposed so as to straddle the rear from the position forward of the maximum width position of the hip flap 4. When a force in a twisting direction is applied to the absorbent article 1 and the absorbent article 1 is deformed along the roundness of the buttocks of the wearer with the 3 rd low basis weight portion 43 as a deformation base point, the portion of the absorbent article 1 having the longest length in the width direction W is deformed, and twisting of the hip flaps 4 can be prevented.
As described above, when the high basis weight portion 45 is moved outward in the width direction by turning over of the wearer or the like, the deformation is absorbed by the cushion region B. If the high basis weight portion 45 moves largely outward in the width direction, the cushion region B cannot absorb the deformation completely, and the outer edge 11OE of the surface sheet 11 may abut against the inner edge 15IE of the fin 15. Since the bending stiffness of the surface sheet is lower than that of the flaps 15, the flaps 15 deform when the outer edges 11OE of the surface sheet 11 come into contact with the inner edges 15IE of the flaps 15, and deformation of the surface sheet 11 and the absorbent core 31 covered with the surface sheet 11 can be suppressed.
While the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as modifications and variations without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description in the present specification is for the purpose of illustration and is not intended to limit the present invention in any way.
The entire contents of the Japanese patent application No. 2015-219153 filed on 11/9/2015 are incorporated herein by reference.
Industrial applicability
An absorbent article can be provided which can suppress the unintentional deformation of the absorber when the posture of the wearer repeatedly changes due to turning over or the like, and can suppress the occurrence of leakage and the deterioration of the wearing feeling.
Description of the reference numerals
1. An absorbent article; 10. a skin patch; 11. a surface sheet; 12. a side panel; 15. a fin; 20. a non-skin patch; 30. an absorbent body; 31. an absorbent core; 32. a core bag body; 321. 1, a core packet body; 322. a 2 nd core package; 41. 1 st low basis weight portion; 42. 2 nd low unit area weight part; 43. a 3 rd low basis weight part; 45. a high unit area weight portion; 61. 1 st main body bonding part; 62. 2 nd main body bonding part; 63. a flap bonding section; 64. a hip flap attachment portion; 81. a front-side compression section; 82. a length compression section; 84. a rear-side compression unit; l, the front-back direction; w, width direction; t, the thickness direction; s1, crotch region; s2, front side area; s3, the posterior region; CL, center line.
Claims (9)
1. An absorbent article having:
a front-back direction and a width direction orthogonal to each other;
a crotch region disposed under the crotch of the wearer;
a posterior region located posterior to the crotch region;
an absorbent core disposed in the crotch region and the back region;
a hip flap extending outward in the width direction from an outer side edge of the absorbent core in the crotch region in the back region,
the absorbent core has: a front-rear direction low basis weight portion located at the widthwise center of the absorbent core in the rear region; and a high unit area weight portion located further outward in the width direction than the front-rear direction low unit area weight portion and having a higher unit area weight than the front-rear direction low unit area weight portion,
the absorbent article has:
a surface sheet covering the front-rear direction low basis weight portion and the high basis weight portion; and
a flap disposed on the hip flap,
the outer edge of the surface sheet is positioned further inward in the width direction than the inner edge of the flap,
a width low weight part having a lower weight per unit area than the surrounding absorbent core and extending in the width direction is provided in the back region,
the width low unit area weight portion is disposed across an imaginary line extending in the width direction from a position of a maximum width of the hip flap.
2. The absorbent article of claim 1, having:
a non-skin facing sheet on a non-skin facing side of the absorbent core; and
an adhesive section provided on the non-skin-facing sheet and having an adhesive for fixing the absorbent article to underwear,
the hip flap has no adhesive portion disposed in a region between an outer edge of the front sheet and an inner edge of the flap.
3. The absorbent article of claim 2, wherein,
the adhesive portion is disposed in an area overlapping with the tab.
4. The absorbent article according to claim 3,
the adhesive portion is not disposed in a region overlapping the front-rear direction low basis weight portion.
5. The absorbent article according to claim 3,
the front-rear direction low-basis weight portion extends in the front-rear direction,
the adhesive portion is not disposed in a region overlapping the front-rear direction low basis weight portion.
6. The absorbent article according to any one of claims 1 to 4, wherein,
the outer edges of the flaps are located at the outer edges of the hip flaps.
7. The absorbent article according to any one of claims 1 to 4, wherein,
the thickness of the region between the outer edge of the surface sheet and the inner edge of the flap is smaller than the thickness of the region on the inner side in the width direction than the outer edge of the surface sheet, and is smaller than the thickness of the region on the outer side in the width direction than the inner edge of the flap.
8. The absorbent article according to any one of claims 1 to 4, wherein,
the front-rear direction low basis weight portion is disposed across an imaginary line extending in the width direction from a position of a maximum width of the hip flap.
9. The absorbent article according to any one of claims 1 to 4, wherein,
the front-rear direction low-basis weight portion extends in the front-rear direction,
the front-rear direction low basis weight portion is disposed across an imaginary line extending in the width direction from a position of a maximum width of the hip flap.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2015-219153 | 2015-11-09 | ||
JP2015219153A JP6080935B1 (en) | 2015-11-09 | 2015-11-09 | Absorbent articles |
PCT/JP2016/073554 WO2017081899A1 (en) | 2015-11-09 | 2016-08-10 | Absorbent article |
Publications (2)
Publication Number | Publication Date |
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CN108348366A CN108348366A (en) | 2018-07-31 |
CN108348366B true CN108348366B (en) | 2020-10-30 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201680066908.XA Active CN108348366B (en) | 2015-11-09 | 2016-08-10 | Absorbent article |
Country Status (5)
Country | Link |
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JP (1) | JP6080935B1 (en) |
KR (1) | KR101935221B1 (en) |
CN (1) | CN108348366B (en) |
TW (1) | TWI612946B (en) |
WO (1) | WO2017081899A1 (en) |
Families Citing this family (2)
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CN110946713B (en) * | 2019-11-26 | 2021-10-29 | 福建恒安集团有限公司 | Elastic fitting disposable sanitary towel |
US20210393452A1 (en) * | 2020-06-23 | 2021-12-23 | Katrina Marie Arceo-Yap | Feminine pad with large petal design |
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CN1761442A (en) * | 2003-05-29 | 2006-04-19 | 尤妮佳股份有限公司 | Sanitary napkin |
CN102378613B (en) * | 2009-03-31 | 2014-04-16 | 尤妮佳股份有限公司 | Absorbent article and method for producing absorbent article |
WO2015033995A1 (en) * | 2013-09-04 | 2015-03-12 | 大王製紙株式会社 | Absorbent article |
WO2015076239A1 (en) * | 2013-11-20 | 2015-05-28 | 花王株式会社 | Absorbent article |
JP6141008B2 (en) * | 2012-07-19 | 2017-06-07 | ユニ・チャーム株式会社 | Absorbent articles |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP4911830B2 (en) * | 2001-04-04 | 2012-04-04 | ピジョン株式会社 | Absorbent products |
CN101065085B (en) | 2004-11-30 | 2011-03-16 | 宝洁公司 | Absorbent article having a pair of rear side flaps |
JP4693530B2 (en) | 2005-07-12 | 2011-06-01 | 花王株式会社 | Disposable diaper and method for producing the same |
JP5988714B2 (en) | 2012-06-11 | 2016-09-07 | 花王株式会社 | Absorbent articles |
EP3038578B1 (en) | 2013-08-27 | 2019-08-07 | The Procter and Gamble Company | Absorbent articles with channels |
-
2015
- 2015-11-09 JP JP2015219153A patent/JP6080935B1/en active Active
-
2016
- 2016-08-10 WO PCT/JP2016/073554 patent/WO2017081899A1/en active Application Filing
- 2016-08-10 CN CN201680066908.XA patent/CN108348366B/en active Active
- 2016-08-10 KR KR1020187014144A patent/KR101935221B1/en active IP Right Grant
- 2016-09-08 TW TW105129147A patent/TWI612946B/en not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1761442A (en) * | 2003-05-29 | 2006-04-19 | 尤妮佳股份有限公司 | Sanitary napkin |
CN102378613B (en) * | 2009-03-31 | 2014-04-16 | 尤妮佳股份有限公司 | Absorbent article and method for producing absorbent article |
JP6141008B2 (en) * | 2012-07-19 | 2017-06-07 | ユニ・チャーム株式会社 | Absorbent articles |
WO2015033995A1 (en) * | 2013-09-04 | 2015-03-12 | 大王製紙株式会社 | Absorbent article |
WO2015076239A1 (en) * | 2013-11-20 | 2015-05-28 | 花王株式会社 | Absorbent article |
Also Published As
Publication number | Publication date |
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TWI612946B (en) | 2018-02-01 |
WO2017081899A1 (en) | 2017-05-18 |
JP2017086382A (en) | 2017-05-25 |
KR101935221B1 (en) | 2019-01-03 |
KR20180063327A (en) | 2018-06-11 |
TW201722382A (en) | 2017-07-01 |
JP6080935B1 (en) | 2017-02-15 |
CN108348366A (en) | 2018-07-31 |
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