CN211271686U - Disposable diaper having a disposable diaper - Google Patents

Disposable diaper having a disposable diaper Download PDF

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Publication number
CN211271686U
CN211271686U CN201921316648.4U CN201921316648U CN211271686U CN 211271686 U CN211271686 U CN 211271686U CN 201921316648 U CN201921316648 U CN 201921316648U CN 211271686 U CN211271686 U CN 211271686U
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CN
China
Prior art keywords
disposable diaper
crotch
region
crotch stretch
decorative
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Active
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CN201921316648.4U
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Chinese (zh)
Inventor
坂口智
山中康弘
高桥真衣香
市原拓巳
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Unicharm Corp
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Unicharm Corp
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers

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

Abstract

The utility model provides a disposable diaper as follows: the fit to the body is improved, and the user can easily grasp that the absorbent core is deformed to a convex shape toward the body side, and feel a feeling of security against leakage is obtained. A disposable diaper (10) comprises: an absorbent core (31) disposed in at least the crotch region; and a pair of crotch stretch units (41) which stretch in the front-rear direction in a region overlapping the absorbent core in the crotch region. The crotch stretch unit is disposed on a non-skin surface side of the absorbent core. A decorative part (81) is arranged near the crotch stretch part or at a part overlapping with the crotch stretch part along the crotch stretch part.

Description

Disposable diaper having a disposable diaper
Technical Field
The present invention relates to a disposable diaper having a pair of crotch stretch units extending in the front-rear direction in a crotch region.
Background
A disposable diaper having a pair of crotch stretch units extending in the front-rear direction in a crotch region is known (see, for example, patent document 1). The crotch stretch unit is disposed in a region overlapping the absorbent core. The absorbent core in the crotch region is lifted up toward the body side due to contraction of the crotch stretch unit.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2018-473
SUMMERY OF THE UTILITY MODEL
The above-described disposable diaper has the following problems.
After wearing, the user visually recognizes from the skin surface side of the diaper to confirm whether the diaper is properly worn or attached to the body. In the disposable diaper of patent document 1, the absorbent core in the crotch region is lifted up toward the body, and even if the absorbent core is in a state of being fitted to the crotch of the wearer, the user may not be able to grasp the deformation state.
Thus, the following disposable diapers are desirable: the fit to the body is improved, and the user can easily grasp that the absorbent core is deformed to a convex shape toward the body side, and feel a feeling of security against leakage is obtained.
A disposable diaper of one form comprises: a front-back direction and a width direction orthogonal to each other; a front waistline region, a back waistline region, and a crotch region disposed between the front waistline region and the back waistline region; an absorbent core disposed at least in the crotch region; and a pair of crotch stretch units which stretch and contract in the front-back direction in a region overlapping with the absorbent core in the crotch region, wherein the crotch stretch unit is disposed on a non-skin surface side of the absorbent core, and a decorative portion is provided along the crotch stretch unit in the vicinity of the crotch stretch unit or in a region overlapping with the crotch stretch unit.
According to this aspect, the decorative portion is provided near the crotch stretch unit or at a portion overlapping with the crotch stretch unit, and the portion deformed by contraction of the crotch stretch unit can be made conspicuous. The user can further grasp that the absorbent core is deformed to fit the body by visually recognizing the contraction state of the crotch stretch unit while visually recognizing the decorative unit. The user can easily grasp the convex shape of the absorbent core toward the body side by the decorative part in the wearing state, and can easily obtain the feeling of comfort by the fit of the diaper to the body. In addition, the user can recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
According to a preferred aspect, the disposable diaper may include: a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core; and an outer sheet disposed on a non-skin surface side of the back sheet, wherein the decorative portion is provided on the non-skin surface of the back sheet, and the crotch stretch unit is disposed between the back sheet and the outer sheet.
According to this aspect, the crotch stretch unit is disposed between the backsheet and the exterior sheet and is located close to the non-skin surface side of the diaper, and therefore, the crotch stretch unit is easily visible from the non-skin surface side of the diaper, and is further easily visible by the decorative unit. The crotch stretch unit and the decorative unit are disposed close to each other in the thickness direction, and the crotch stretch unit and the decorative unit can be integrally shown. The user can further grasp the convex deformation of the absorbent core toward the body side by the decorative part, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch portion.
According to a preferred aspect, the disposable diaper may include: a joining region in which the back surface sheet and the exterior sheet are joined; and a non-joined region which is adjacent to the joined region and in which the back sheet and the outer sheet are not joined, at least a part of the crotch stretch unit and at least a part of the decorative unit being disposed in the joined region.
In the joining region, the back sheet is joined to the exterior sheet. The visibility of the decorative portion in the joining region is higher than the visibility of the decorative portion in the non-joining region. Since the crotch stretch unit is disposed in the joining region where the decorative unit is highly visible, the deformation state of the absorbent core can be made more conspicuous. The user can further grasp the convex deformation of the absorbent core toward the body side by the decorative part, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch portion.
According to a preferred aspect, the disposable diaper may have a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core, and the crotch stretch unit may be disposed between the back sheet and the absorbent core.
According to this aspect, the crotch stretch unit is disposed between the backsheet and the absorbent core, and is located closer to the absorbent core. Therefore, the absorbent core is more easily deformed to fit the body by contraction of the crotch stretch unit. Further, by making the deformation of the absorbent core by the crotch stretch unit conspicuous by the decorative portion, the user can more obtain a feeling of security that the diaper is fitted to the crotch portion.
According to a preferred aspect, the absorbent core in the crotch region may be provided with a pair of low basis weight portions extending in the front-rear direction and arranged at intervals in the width direction, and at least a part of the crotch stretch unit may overlap the low basis weight portions.
According to this form, the absorbent core is more easily deformed and is easily deformed into a convex shape toward the wearer by the low basis weight portion. This makes it possible for the user to further grasp that the absorbent core has been deformed into a convex shape toward the body, and to more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch portion.
According to a preferred aspect, at least one of a front end edge and a rear end edge of the low basis weight portion may extend outward in the front-rear direction with respect to the crotch stretch portion, and the decorative portion may be disposed over the entire area of the low basis weight portion in the front-rear direction.
According to this aspect, the disposable diaper is provided with a region in which the low basis weight portion and the crotch stretch unit are arranged in the front-rear direction, and a region in which the low basis weight portion protrudes outward in the front-rear direction with respect to the crotch stretch unit. In the region where the low basis weight portion and the crotch stretch unit are arranged in the front-rear direction, the deformation base points are formed by the low basis weight portion, and are lifted up toward the body by contraction of the crotch stretch unit. The low basis weight portion forms a deformation base point in a region extending outward in the front-rear direction with respect to the crotch stretch unit, but the contraction of the crotch stretch unit does not easily work. Thereby, the deformation state of the absorbent core in the two regions is liable to be different. Since the decorative portion is provided so as to straddle two regions, the user can easily grasp different deformation forms. Depending on the deformation form of the absorbent core, the orientation of the diaper in the front-back direction and the position of the diaper in the front-back direction as a whole can be grasped, and it is easy to grasp whether or not the diaper is worn properly on the body.
According to a preferred aspect, the crotch stretch unit and the decorative unit may be disposed across the center of the disposable diaper in the front-rear direction.
According to this aspect, the crotch stretch unit and the decorative unit straddle the center in the front-rear direction of the diaper, so that the user can easily grasp whether the absorbent core is deformed into a convex shape toward the body side, regardless of whether the user visually recognizes the front side or the rear side of the diaper.
According to a preferred aspect, the crotch stretch unit may be disposed not to extend over the center of the disposable diaper in the front-rear direction, and the decorative unit may be disposed to extend over the center of the disposable diaper in the front-rear direction.
According to this aspect, the crotch stretch unit is disposed only on one side with respect to the center in the front-rear direction of the diaper, and therefore the front side and the rear side of the diaper can be made different in appearance. The user can easily grasp the orientation of the diaper in the front-rear direction and the position of the diaper in the front-rear direction as a whole, and whether or not the diaper is worn properly on the body.
According to a preferred aspect, the decorative portion may have a length in the front-rear direction longer than a length in the front-rear direction of the crotch stretch unit.
According to this aspect, the decorative portion is more conspicuous, and the user can easily grasp the convex shape of the absorbent core toward the body side by the decorative portion. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to a preferred aspect, the decorative portion may include: a front extension portion that extends forward relative to the crotch stretch portion; and a rear extension portion extending rearward relative to the crotch stretch portion, wherein the front extension portion has a length in the front-rear direction that is longer than a length in the front-rear direction of the rear extension portion.
According to this aspect, the front side extension portion and the rear side extension portion do not contract in the front-rear direction due to contraction of the crotch stretch unit, and visibility is easily ensured. In general, when the wearing state of the diaper is confirmed, the front side of the wearer is visually recognized. When confirming the wearing state of the diaper, the user can easily visually recognize the front extension portion and easily grasp whether the diaper is worn properly with respect to the body.
According to a preferred aspect, the decorative portion may have a length in the width direction that is longer than a length in the width direction of the crotch stretch unit.
According to this aspect, the decorative portion is more conspicuous, and the user can easily grasp the convex shape of the absorbent core toward the body side by the decorative portion. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to a preferred aspect, the decorative portion may be provided in a pair at a distance along the width direction, and the pair of crotch stretch units may be disposed in a region between the pair of decorative portions.
According to this aspect, the decorative portion is disposed across the crotch stretch unit in the width direction, and the deformation state caused by the contraction of the crotch stretch unit can be made more conspicuous. The user can more easily grasp the convex deformation of the absorbent core toward the body side, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to a preferred aspect, the distance between the decorative portion and the crotch stretch unit positioned on one side with respect to the center in the width direction of the disposable diaper may be different from the distance between the decorative portion and the crotch stretch unit positioned on the other side with respect to the center in the width direction of the disposable diaper.
According to this aspect, when the absorbent core is deformed into a convex shape toward the body side by contraction of the crotch stretch unit, the vicinity of the crotch stretch unit which becomes a point of deformation may be difficult to visually recognize from the non-skin surface side of the diaper. Since the distance between the crotch stretch unit and the decorative unit on one side with respect to the center in the width direction of the diaper is different from the distance between the crotch stretch unit and the decorative unit on the other side in the width direction of the diaper, the visibility of the decorative unit on the other side can be easily ensured even when the visibility of the decorative unit on one side is difficult to ensure. Thus, the user can easily grasp the convex deformation of the absorbent core toward the body side by the decorative portion, and can easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to a preferred aspect, an indicator portion extending in the front-rear direction may be provided in a region between the pair of decorative portions, and a color difference Δ E between the indicator portion and the decorative portion may be 3.0 or more.
According to this form, the user can easily distinguish the indication portion and the decorative portion. The user can easily grasp the convex deformation of the absorbent core toward the body side by the decorative part, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to a preferred aspect, an indicator portion extending in the front-rear direction may be provided in a region between the pair of decorative portions, and a hue number of a color of the indicator portion and a hue number of a color of the decorative portion may be shifted by 2 or more in a 24-color chart classified by an ostwald color circle.
According to this form, the user can easily distinguish the indication portion and the decorative portion. The user can easily grasp the convex deformation of the absorbent core toward the body side by the decorative part, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
According to one aspect, the disposable diaper may be a pants-type disposable diaper. In addition, according to another aspect, the disposable diaper may be a tape-type disposable diaper.
According to a preferred aspect, the disposable diaper may be a tape-type disposable diaper, and the decorative portion may be a convex shape bulging inward in the width direction.
When wearing a belt-type disposable diaper, the buttocks are placed on the back waist region, the diaper is pulled toward the crotch region, and the body is covered with the crotch region. At this time, the decorative portion is curved, and therefore, the user can easily grasp the position in the front-rear direction in the entire diaper by the shape of the decorative portion. The user can pull the diaper to an appropriate position and wear the diaper, and can wear the diaper at a more appropriate position.
According to a preferred aspect, the disposable diaper may be a belt-type disposable diaper, wherein the absorbent core is provided with a pair of deformation base point portions which are arranged at intervals in the width direction, and the deformation base point portions extend toward the rear side and toward the outer side in the width direction in a region which is located on the rear side of the crotch stretch unit and between the pair of decorative portions.
According to this aspect, when the diaper is pulled toward the crotch region side while placing the buttocks on the back waist region during wearing, the absorbent core deforms with the deformation origin point portions extending inward in the width direction from the back waist region toward the crotch region as origin points. This allows the absorbent core to be deformed so that the length in the width direction thereof is shortened toward the crotch region. The absorbent core in the crotch region is deformed into a convex shape toward the body by contraction of the pair of crotch stretch units. Thereby, the absorbent core in the crotch region is disposed along the body side. The decorative portion is disposed with the deformation base point portion and the crotch stretch portion interposed therebetween, and the portion of the absorbent core deformed in a convex shape can be made more conspicuous. Thus, the user can easily grasp the convex deformation of the absorbent core toward the body side by the decorative portion, and can more easily obtain a feeling of security against leakage.
According to a preferred aspect, the entire crotch stretch unit and the entire decorative unit may extend in the front-rear direction. According to this aspect, the crotch stretch unit and the decorative unit can be further integrally shown. The user can further grasp the convex deformation of the absorbent core toward the body side by the decorative part, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit through the decorative unit even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch unit.
Drawings
Fig. 1 is a plan view of a disposable diaper according to an embodiment, as viewed from the skin surface side.
Fig. 2 is a plan view of the disposable diaper of the embodiment as viewed from the non-skin surface side.
Fig. 3 is a top view of an absorbent core of an embodiment.
Fig. 4 is a schematic sectional view of the disposable diaper shown in fig. 1 taken along the section a-a.
Fig. 5 is a schematic sectional view of the disposable diaper shown in fig. 1 taken along the section B-B.
Fig. 6 is a view schematically showing a wearing state of a disposable diaper in a cross section a-a.
Fig. 7 is a view schematically showing a wearing state of the disposable diaper according to the embodiment.
Fig. 8 is a plan view of a disposable diaper according to a modification example, as viewed from the non-skin surface side.
Description of the reference numerals
10. 10A, a disposable diaper; 10LC, center in the front-rear direction of the diaper; 10WC, center of the diaper in the width direction; 21. a surface sheet; 22. a side panel; 23. a back sheet; 24. an exterior sheet; 30. an absorbent body; 31. an absorbent core; 32. a core cladding; 33. a low unit area weight portion; 41. 41A, a crotch stretch unit; 42. a leg-surrounding expansion part; 43. a leakage-proof expansion part; 45. a waist stretching part; 51. an indicating section; 71. a central high rigidity portion; 72. a rear high stiffness portion; 81. 81A, a decorative part; 811. a front side extension; 812. a rear-side extension; 85. a deformation base point portion; 91. a fastening tape; 92. a base; 93. a fastening part; 95. a target portion; s1, front waistline region; s2, a back waistline area; s3, a crotch region; t, the thickness direction; t1, skin surface side; t2, non-skin surface side; l, the front-back direction; w, width direction.
Detailed Description
(1) Brief description of the embodiments
At least the following matters will become clear from the description of the present specification and the accompanying drawings.
A disposable diaper of one form comprises: a front-back direction and a width direction orthogonal to each other; a front waistline region, a back waistline region, and a crotch region disposed between the front waistline region and the back waistline region; an absorbent core disposed at least in the crotch region; and a pair of crotch stretch units which stretch and contract in the front-back direction in a region overlapping with the absorbent core in the crotch region, wherein the crotch stretch unit is disposed on a non-skin surface side of the absorbent core, and a decorative portion is provided along the crotch stretch unit in the vicinity of the crotch stretch unit or in a region overlapping with the crotch stretch unit.
(2) Overall schematic structure of disposable diaper
Hereinafter, a disposable diaper according to an embodiment will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and it should be noted that the ratio of the respective dimensions and the like are different from the actual ratio of the respective dimensions and the like. Therefore, specific dimensions and the like should be determined with reference to the following description. In addition, the drawings may include portions having different dimensional relationships and ratios from each other.
The disposable diaper may be a tape-type disposable diaper or a pants-type disposable diaper. Fig. 1 is a plan view of a disposable diaper 10 of the present embodiment as viewed from the skin surface side, and fig. 2 is a plan view of the disposable diaper 10 of the present embodiment as viewed from the non-skin surface side. Fig. 3 is a plan view of the absorbent core of the embodiment as viewed from the skin surface side. The plan views shown in fig. 1 to 3 show the disposable diaper in an extended state. Fig. 4 is a schematic sectional view of the disposable diaper shown in fig. 1 taken along the section a-a. Fig. 5 is a schematic sectional view of the disposable diaper shown in fig. 1 taken along the section B-B. The extended state in the present invention is a state in which the disposable diaper 10 is extended to a state in which wrinkles are not formed. In addition, the natural state in the present invention means the following state: when the disposable diaper 10 is stored in a package, the disposable diaper 10 is taken out from the package and left to stand in an atmosphere of 20 ℃. + -. 2 ℃ and a relative humidity of 60%. + -. 5% RH for 24 hours.
The disposable diaper 10 has a front-back direction L and a width direction W orthogonal to each other. The front-back direction L is defined by a direction extending to the front side and the back side of the body. In other words, the front-back direction L is a direction extending along the front-back direction in the disposable diaper 10 after being unfolded. The disposable diaper 10 has a thickness direction T orthogonal to both the front-back direction L and the width direction W. The thickness direction T extends toward the skin surface side T1 of the wearer and the non-skin surface side T2 opposite to the skin surface side.
The disposable diaper 10 has a front waistline region S1, a back waistline region S2, and a crotch region S3. The front waistline region S1 is a region opposed to the front waistline (abdomen) of the wearer. The back waistline region S2 is a region opposed to the back waistline (back) of the wearer, including a region where the body (buttocks) is placed when worn. The crotch region S3 is a region located in the crotch of the wearer and disposed between the front waistline region S1 and the back waistline region S2. The crotch region S3 is a region provided with leg hole openings arranged around the legs of the wearer. The leg hole openings are portions recessed inward in the width direction from the outer edge of the disposable diaper.
The disposable diaper 10 includes an absorbent core 31 containing an absorbent material. The absorbent core 31 contains an absorbent material such as comminuted pulp or a Super Absorbent Polymer (SAP), or a mixture of these materials. As shown in fig. 4, the absorbent core 31 may be covered by a core wrap 32. The absorbent body 30 may be composed of an absorbent core 31 and a core wrap 32. The core wrap 32 may be made of a tissue paper, and is disposed on the skin surface side T1 of the absorbent core 31 and the non-skin surface side T2 of the absorbent core 31.
As shown in fig. 1 and 4, the top sheet 21 and the side sheet 22 may be provided on the skin surface side T1 of the absorbent body 30 including the absorbent core 31. The top sheet 21 may be disposed so as to extend across the center of the absorber 30 in the width direction W. The side sheet 22 may be disposed so as to cover the outer side portion of the surface sheet 21. The top sheet 21 and the side sheet 22 may be made of a liquid-permeable sheet such as a nonwoven fabric or an apertured plastic film. The inner side portion of the side sheet 22 may be folded back to overlap. A leakage-preventing stretchable portion 43 stretchable in the front-rear direction L may be provided between the overlapped side sheets 22. The leakage preventing stretchable portion 43 may be formed of a rubber band stretchable in the front-rear direction L. The side sheet 22 and the leakage-preventing stretchable and contractible portion 43 constitute leakage-preventing gathers 60 (see fig. 6) rising toward the skin surface side T1 when worn.
The back sheet 23 and the outer sheet 24 may be provided on the non-skin surface side T2 of the absorbent body 30. The exterior sheet 24 may be provided on the non-skin surface side T2 of the back sheet 23. The length of the back sheet 23 in the width direction W may be shorter than the length of the exterior sheet 24 in the width direction W, and the length of the back sheet 23 in the front-rear direction L may be shorter than the length of the exterior sheet 24 in the front-rear direction L. The back sheet 23 may be formed of a liquid impermeable film. The exterior sheet 24 may be made of a liquid-permeable nonwoven fabric.
As shown in fig. 2, the disposable diaper 10 may have: a joining region R1 in which the back sheet 23 and the exterior sheet 24 are joined together in the joining region R1; and a non-bonded region R2 in which the back sheet 23 and the exterior sheet 24 are arranged so as to overlap without being bonded in the non-bonded region R2. The joining region R1 is provided in a region where at least the crotch stretch unit 41 is disposed. The non-joined region R2 is adjacent to the joined region R1 and extends outward in the front-rear direction L from an end edge in the front-rear direction L of the joined region R1. The non-joined region R2 reaches the front end edge and the rear end edge of the back surface sheet 23. The joining region R1 may be formed continuously along the width direction W and provided over the entire width direction of the back surface sheet 23. Alternatively, the joining region R1 may be provided outside the non-joining region R2 in the width direction. In the joining region R1, the back sheet 23 and the exterior sheet 24 may be joined by a hot-melt adhesive. The non-bonding region in the present invention includes not only a region where an adhesive is not applied but also a region where members are not bonded to each other by the adhesive although the adhesive is slightly applied. In addition, the joining region in the present invention includes not only the region to which the adhesive is applied but also a region surrounded by the region to which the adhesive is applied (a region surrounded by a spiral-coated curve). The region surrounded by the region to which the adhesive is applied may not surround the entire periphery, and may surround at least half or more of the entire periphery.
A fastening tape 91 is provided at the outer side of the back waistline region. The fastening tape 91 has a base portion 92 and an engaging portion 93. The base portion 92 is disposed between the outer sheet 24 and the side sheet 22 in the thickness direction T, and extends outward from the outer sheet 24 and the side sheet 22 in the width direction W. The engaging portion 93 is disposed on the base portion 92 and engages with the target portion 95. The target portions 95 are arranged at intervals in the width direction in the front waistline region S1, and the fastening tapes 91 are fixed to the target portions 95, respectively.
The indication section 51 may be disposed between the back sheet 23 and the absorber 30. The indicator 51 may be disposed on the non-skin surface side T2 with respect to the absorbent core 31. The indicating portions 51 may extend in the front-rear direction L and be arranged at intervals in the width direction W. The indicator 51 is disposed between the low basis weight portions 33 described later. The indicator 51 is configured to be capable of grasping the absorption state of body fluid from the non-skin surface side T2 of the disposable diaper 10 by the absorbent body 30 absorbing body fluid and changing its color.
The disposable diaper 10 may have a leg hole stretch unit 42 that stretches and contracts in the front-rear direction at a position outside the absorbent core 31 in the width direction. The leg hole stretch units 42 may be provided between the side sheet 22 and the back sheet 23 and between the side sheet 22 and the outer sheet 24. The leg hole stretch units 42 are made of band-shaped stretch sheets that stretch in the front-rear direction L. The leg hole opening of the disposable diaper 10 is brought into contact with the leg hole by contraction of the leg hole stretch units 42 when worn.
The disposable diaper 10 may have a waist stretch unit 45 extending in the width direction W along the rear end edge of the disposable diaper. The waistline stretch units 45 may be provided between the back sheet 23 and the outer sheet 24, between the topsheet 21 and the outer sheet 24, and between the side sheet 22 and the outer sheet 24. The rear end edge of the waist stretching portion 45 may be located on the front side of the rear end edge of the disposable diaper, and the front end edge of the waist stretching portion 45 may be located on the front side of the rear end edge of the absorbent core 31. The waistline stretch unit 45 may extend outward in the width direction W with respect to the absorbent core 31. The waistline stretch unit 45 is formed of a band-shaped stretch sheet which stretches in the width direction W.
The disposable diaper 10 may have a pair of crotch stretch units 41 provided in a region overlapping the absorbent core 31 in the crotch region. The crotch stretch unit 41 may be disposed on the non-skin surface side of the absorbent core 31 or may be disposed on the non-skin surface side of the absorbent body 30. The crotch stretch unit 41 may be disposed between the absorbent core 31 and the back sheet 23, or may be disposed between the back sheet 23 and the outer sheet 24. In the case of the configuration in which the crotch stretch unit 41 is disposed between the absorbent core 31 and the back sheet 23, the crotch stretch unit 41 may be provided between the core wrap 32 disposed on the non-skin side of the absorbent core 31 and the back sheet 23, or the crotch stretch unit 41 may be provided between the core wrap 32 disposed on the non-skin side of the absorbent core 31 and the absorbent core 31. The crotch stretch unit 41 may be disposed only in a region overlapping the absorbent core 31, and may be disposed only on the inner side in the width direction with respect to the outer edge of the absorbent core 31. The crotch stretch unit 41 of the present embodiment is disposed between the back sheet 23 and the outer sheet 24. The crotch stretch unit 41 extends in the front-rear direction L and is disposed at intervals in the width direction W. The crotch stretch unit 41 is not disposed at the center of the absorbent core 31 in the width direction W, and two crotch stretch units 41 are disposed on each of both sides of the center of the absorbent core 31 in the width direction W. Thus, the absorbent core in the region overlapping the crotch stretch unit 41 is further lifted toward the body side than the center in the width direction of the absorbent core by the contraction of the crotch stretch unit 41. The pair of crotch stretch units 41 may be positioned inward in the width direction from the outer edge of the absorbent core 31. The region located between the pair of crotch stretch units 41 is lifted toward the body side with respect to the region located outside the pair of crotch stretch units 41 in the width direction. Thus, the center in the width direction of the absorbent core is deformed into a convex shape with the side portions as base points, and the fit to the crotch of the body can be ensured. The crotch stretch unit 41 is formed of a rubber band arranged along the front-rear direction L. In another embodiment, the crotch stretch unit 41 may be formed of a band-shaped stretch sheet that stretches in the front-rear direction, may be formed of one elastic band, or may be formed of three or more elastic bands. In the present invention, the overlapped state is a state in which one member is overlapped with another member in a plan view, and the other member is disposed on the skin surface side or the non-skin surface side of the one member. In the overlapped state, not only a state where one member and the other member are in contact with each other but also a structure where the other member is sandwiched between the one member and the other member is included.
The crotch stretch unit 41 may straddle the center 10LC in the front-back direction of the disposable diaper. The contraction of the crotch stretch unit 41 can raise the center 10LC of the disposable diaper in the front-back direction toward the body. In particular, in a mode in which the skin surface sides of the disposable diaper before use are folded into two so as to face each other, the folding tendency by folding can be improved. In other embodiments, the crotch stretch unit 41 may be disposed only on the front side of the center 10LC or only on the rear side of the center 10LC, without extending across the center 10LC in the front-rear direction of the disposable diaper.
The crotch stretch unit 41 is positioned inward in the width direction W from the outer edge of the absorbent core 31. A region in which the contraction force of the crotch stretch unit 41 is less likely to act is provided on the absorbent core 31 at a position outside the crotch stretch unit 41 in the width direction W. In fig. 4, a side region R31 located outside the crotch stretch unit 41 in the absorbent core 31 and a central region R32 located between the side regions R31 are shown. The side region R31 is a region located outward in the width direction W from the crotch stretch unit 41 located outermost in the width direction W. The central region R32 is a region that combines the region overlapping the crotch stretch unit 41 and the region located inward in the width direction W of the crotch stretch unit 41. The central region R32 is pulled up toward the body side with respect to the side regions R31 by contraction of the crotch stretch unit 41. The deformation form of the absorbent core 31 when worn will be described in detail below.
In addition, the stretchable portion including the leakage-proof stretchable portion 43, the leg-surrounding stretchable portion 42, the waist stretchable portion 45, and the crotch stretchable portion 41 of the present invention is a portion in which elastic members such as rubber bands and stretchable sheets are arranged in a stretchable state, and does not include a portion in which elastic members are arranged in a non-stretchable state. That is, the stretchable portion is an effective length portion of the elastic member constituting the stretchable portion.
The disposable diaper 10 may have a decorative portion 81. The decorative portion 81 may be visible from the non-skin surface side of the disposable diaper 10. The non-skin surface of the diaper is the surface opposite to the surface facing the skin of the wearer when worn. In the present invention, "visually recognizable" means that a subject having good vision (1.0 or more) in both eyes can visually recognize an object at a distance of about 30cm to 50cm in a room brightly illuminated with daylight (color temperature reference values 4600K to 5400K (on)). The decorative portion 81 may be provided on the non-skin surface of the back sheet 23, on the skin surface of the exterior sheet 24, or on the non-skin surface of the absorbent body. The decorative portion 81 of the present embodiment is printed on the skin surface of the back sheet. The decoration portions 81 are disposed at positions on the outer side in the width direction than the indication portions 51 at intervals in the width direction. That is, the indicator 51 is provided in the region between the pair of decorative portions 81. The decorative portion 81 extends in the front-rear direction L. The decorative portion 81 is provided in the vicinity of the crotch stretch unit 41 or in a portion overlapping the crotch stretch unit 41. Here, when the decorative portion 81 is provided in the vicinity of the crotch stretch unit 41, the decorative portion 81 is adjacent to the crotch stretch unit 41 or the separation distance between the crotch stretch unit 41 and the decorative portion 81 is 10mm or less, particularly preferably 5mm or less, in a plan view of the extended and stretched diaper shown in fig. 2.
The decorative portion 81 may be linear along the front-rear direction L, curved while extending along the front-rear direction L, or a combination thereof. The decorative portion 81 may be linear or belt-shaped, or may be in the shape in which a plurality of patterns are shown in a straight line. As each pattern constituting the plurality of patterns, any pattern such as a circle, a star, a heart, a figure simulating an animal, a note, or the like can be used. The patterns may be a combination of patterns having different sizes, or a combination of patterns having the same size. The decorative portion 81 may be one or two or more. The decorative portion 81 may be provided by printing on the back sheet 23 or the like, or may be formed by applying a hot-melt adhesive containing a colorant or the like to the back sheet or the like.
The decorative portion 81 is preferably black, gray, or colored with respect to, for example, an exterior sheet or a material for forming an exterior material which is mostly white. Examples of the color include red, orange, yellow-green, cyan, blue, and violet. In the disposable diaper having the indicator 51, the color of the decorative portion 81 is preferably different from the colors of the indicator before and after development.
(3) Absorbent core structure
Next, the structure of the absorbent core 31 will be described in detail with reference to fig. 3. The absorbent core 31 has: a narrow portion 35 having a length in the width direction shorter than the maximum width 31M of the absorbent core 31; and a wide portion disposed at a position further outward in the front-rear direction than the narrow portion 35. The narrow portions 35 are disposed between the front and rear wide portions. The width-directional length of the narrow portion 35 is longer toward the outside in the front-rear direction L. The shape of the absorbent core 31 in plan view is an hourglass shape. In addition, the shape of not only the absorbent core 31 but also the absorbent body including the core wrap may be an hourglass shape.
The absorbent core 31 may have a low basis weight portion 33 in which the basis weight of the absorbent material is lower than the basis weight of the absorbent material in the surrounding region. The low area weight portion 33 is provided along the front-rear direction L. The low basis weight portion 33 may extend in the front-rear direction L, and may be parallel to the front-rear direction L or may be inclined at an angle of less than 90 degrees with respect to the front-rear direction L.
The low basis weight portion 33 is a portion in which the basis weight of the absorbent material is lower than the basis weight of the absorbent material of the surrounding absorbent core 31, and has a thickness smaller than the thickness of the surrounding absorbent core 31 and a low rigidity. Therefore, the low basis weight portion 33 is likely to be a deformation base point in a worn state. The deformation base points extending in the front-rear direction are easily formed in the absorbent core 31 in the worn state. The low basis weight portion 33 may be a portion where the basis weight of the absorbent material is substantially zero (a portion where the basis weight is 0 in design but the surrounding absorbent material is included), or a portion where the absorbent material having a basis weight smaller than the surrounding basis weight is arranged. The low basis weight portion 33 may be a slit having a constant length along the width direction W, or may be a notch having a length in the width direction W of substantially zero. The length of each low basis weight portion 33 in the width direction W may be 2mm or more and 10mm or less, the length of each low basis weight portion 33 in the front-rear direction L may be 30mm or more and 180mm or less, and more preferably, the thickness of the absorbent core 31 may be or more and 8mm or less. The length in the width direction of the low basis weight portion 33 is equal to or greater than the thickness of the absorbent core 31, so that the absorbent core 31 is easily deformed in the thickness direction with the low basis weight portion 33 as a base point. Further, since the length of the low basis weight portion 33 in the width direction is 8mm or less, the feeling of uneasiness in the absorption performance due to the long length of the low basis weight portion in the width direction can be suppressed.
The low basis weight portions 33 are arranged in a pair at intervals along the width direction W. The low basis weight parts 33 may be disposed on both sides of the center 10WC of the disposable diaper in the width direction W with an interval therebetween. The center of the low basis weight portion 33 in the front-rear direction may be disposed on the rear side of the center 10LC in the front-rear direction of the disposable diaper.
The absorbent core 31 may have a high rigidity portion 70 having higher rigidity than the surrounding area. The high rigidity portion 70 may include a central high rigidity portion 71 disposed between the pair of crotch stretch units 41, a rear high rigidity portion 72 disposed on the rear side of the crotch stretch units 41, and a front high rigidity portion 73 disposed on the front side of the crotch stretch units 41. The central high rigidity portion 71, the rear high rigidity portion 72, and the front high rigidity portion 73 are separated from each other in the front-rear direction L.
The high rigidity portion 70 is a region having higher bending rigidity than the surrounding region. The high rigidity portion 70 may be a portion having a higher weight per unit area than that of the surrounding region, or may be a portion in which the absorbent core 31 is compressed in the thickness direction. The high rigidity portion 70 of the present embodiment is a portion provided with a compressed portion in which the absorbent core 31 is compressed. The compressed portion may be formed by compressing at least the absorbent core 31 in the thickness direction T, or may be formed by compressing the absorbent core 31 and another member such as the core cladding 32.
The central high rigidity portion 71 is provided in a region between the pair of low basis weight portions 33. The front end edge of the central high rigidity portion 71 may coincide with the front end edge of the low basis weight portion 33 or may be located on the rear side of the front end edge of the low basis weight portion 33. The rear end edge of the central high rigidity portion 71 may be located on the front side of the rear end edge of the low basis weight portion 33. The center of the central high rigidity portion 71 in the front-rear direction may be located forward of the center of the low basis weight portion 33 in the front-rear direction. The central high rigidity portion 71 may be disposed at a distance from the low unit area weight portion 33 in the width direction W. The center high rigidity portion 71 may straddle the center 10LC in the front-back direction of the disposable diaper and the center 10WC in the width direction W of the disposable diaper.
The crotch stretch unit 41 may be located on both sides of the center in the width direction of the central high rigidity portion 71 and may extend rearward relative to the central high rigidity portion 71. The absorbent core 31 may have a 1 st region R41 in which the crotch stretch unit 41 is disposed at a position rearward of the central high rigidity unit 71, a 2 nd region R42 in which the central high rigidity unit 71 and the crotch stretch unit 41 overlap in the thickness direction or the width direction, and a 3 rd region R43 in which the central high rigidity unit 71 is disposed at a position forward of the crotch stretch unit 41. The 1 st region R41 and the 2 nd region R42 are adjacent in the front-rear direction L, and the 2 nd region R42 and the 3 rd region R43 are adjacent in the front-rear direction L. The rear end edge of the 1 st region R41 coincides with the rear end edge 41R of the crotch stretch unit 41, and the front end edge of the 1 st region R41 coincides with the rear end edge 71R of the central high rigidity portion 71. The rear end edge of the 2 nd region R42 coincides with the front end edge of the 1 st region R41, and the front end edge of the 2 nd region R42 coincides with the front end edge 41F of the crotch stretch unit 41. The rear end edge of the 3 rd region R43 coincides with the front end edge of the 2 nd region R42, and the front end edge of the 3 rd region R43 coincides with the front end edge 71F of the central high rigidity portion 71.
The rear high rigidity portion 72 may be disposed on the rear side of the low basis weight portion 33. The outer side edge of the rear high rigidity portion 72 may extend outward in the width direction W toward the rear side. The length of the front end edge of the rear high rigidity portion 72 in the width direction W may be longer than the length of the center high rigidity portion 71 in the width direction W. The rear high rigidity portion 72 may straddle the center 10WC of the disposable diaper in the width direction W.
The front high rigidity portion 73 may be disposed on the front side of the low basis weight portion 33. The front high rigidity portions 73 may be disposed on both sides of the center 10WC of the disposable diaper in the width direction W with a space therebetween along the width direction W. The front end edge of the front high rigidity portion 73 may extend toward the outer side in the width direction W toward the front side.
The absorbent core 31 may have a pair of deformation origin point portions 85 provided at positions rearward of the crotch stretch unit 41. The deformation base point portions 85 extend toward the rear side and outward in the width direction W at positions rearward of the crotch stretch unit 41, and are arranged in a pair at intervals in the width direction W. The deformation origin portions 85 serve as origin points of deformation of the absorbent core 31 in the thickness direction. The deformation base point portion 85 of the present embodiment is constituted by the outer portion 72S of the rear high rigidity portion 72. The deformation base point portion 85 has a base point edge 85E serving as an edge of a deformation base point. The substantial point edge is the edge of a fold line forming the thickness of the absorbent core 31. The base point edge 85E of the present embodiment is the outer edge 72E of the rear high rigidity portion 72. The deformation base point portion 85 of the present embodiment includes a region extending inward in the direction perpendicular to the line along the base point edge 85E from the base point edge 85E by the thickness of the absorbent core 31.
Here, the outer side portion in the present invention is a portion occupying a certain range along the width direction W including an outer side edge in the width direction W, and the outer side edge is an outer side edge in the width direction W. The inner side portion is a portion that occupies a certain range along the width direction W including an inner edge in the width direction W, and the inner side edge is an inner edge in the width direction W. The deformation origin point portion 85 is not limited to the outer side portion of the high rigidity portion formed by the compression portion, and may be a point from which the absorbent core 31 deforms in the thickness direction. As for the deformation base point portion in other forms, it will be described below.
(4) Structure of decorative part
Next, the structure of the decorative portion 81 will be described in detail. Fig. 6 is a view schematically showing a wearing state of a disposable diaper in a cross section a-a. Fig. 7 is a view schematically showing a wearing state of the disposable diaper according to the embodiment, and is a view visually showing a wearer in a lying state from the front side. The line BL shown in fig. 6 represents a line of the body of the wearer.
When the disposable diaper is worn, a force toward the skin surface side T1 and the inside in the width direction W is applied to the absorbent core 31 in the crotch region S3, and the center in the width direction W of the absorbent core 31 is pulled up toward the body side by contraction of the crotch stretch unit 41 with respect to the absorbent core 31 in the crotch region S3. The pair of crotch stretch units 41 contract to become convex toward the body side, and the center region R32 rises relative to the side regions R31. This allows the absorbent core 31 in the crotch region to be arranged along the body, thereby facilitating the accommodation of the absorbent core 31 in the crotch of the wearer.
A decorative portion 81 is provided along the crotch stretch unit 41 in the vicinity of the crotch stretch unit 41 or in a region overlapping the crotch stretch unit 41. The decorative portion 81 can make a portion deformed by contraction of the crotch stretch unit 41 conspicuous. The user can more understand that the absorbent core 31 is deformed to fit the body by visually recognizing the contracted state of the crotch stretch unit 41 while visually recognizing the decorative unit 81. The wearer can easily recognize the convex shape of the absorbent core 31 toward the body side by the decorative part 81 when wearing the diaper, and can easily feel a feeling of comfort by the fit of the diaper to the body.
The crotch stretch unit 41 is disposed between the back sheet 23 and the outer sheet 24, and is located close to the non-skin surface side of the diaper. The crotch stretch unit 41 is easily visible from the non-skin surface side of the diaper, and the crotch stretch unit 41 is more easily visible by the decorative portion 81. The user can easily visually recognize the crotch stretch unit 41 even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch portion.
In a modified example, the crotch stretch unit 41 may be disposed between the back sheet 23 and the absorbent core 31. In the modified example, the crotch stretch unit 41 is close to the absorbent core 31. Therefore, the absorbent core 31 is more easily deformed to fit the body by contraction of the crotch stretch unit 41. Further, the deformation of the absorbent core 31 by the crotch stretch unit 41 is made conspicuous by the decorative unit 81, so that the user can more feel a sense of security that the diaper is fit to the crotch portion.
The decorative portion 81 may be provided on the non-skin surface of the back sheet 23. The crotch stretch unit 41 and the decorative unit 81 are disposed close to each other in the thickness direction T, and the crotch stretch unit 41 and the decorative unit 81 can be integrally shown. The user can further grasp the convex deformation of the absorbent core 31 toward the body side by the decorative part 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
The entire crotch stretch unit 41 and the entire decorative unit 81 may extend in the front-rear direction. The crotch stretch unit 41 and the decorative portion 81 can be more integrally shown as both the crotch stretch unit 41 and the decorative portion 81 extend in the front-rear direction L. The user can further grasp the convex deformation of the absorbent core 31 toward the body side by the decorative portion 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion. Here, the structure extending in the front-rear direction L includes not only a structure parallel to the front-rear direction L but also a structure inclined with respect to the front-rear direction L and a wave shape having portions extending in the width direction and the front-rear direction and extending in the front-rear direction as a whole. In the structure inclined with respect to the front-rear direction L, the angle formed by the front-rear direction L and the decorative portion 81 may be 45 degrees or less.
At least a part of the crotch stretch unit 41 and at least a part of the decorative unit 81 may be disposed in the joining region R1. In the joining region R1, the back sheet 23 is joined to the exterior sheet 24. The visibility of the decorative portion 81 in the joining region R1 is higher than the visibility of the decorative portion 81 in the non-joining region R2. Since the crotch stretch unit 41 is disposed in the joining region R1 where the decorative portion 81 is highly visible, the deformed state of the absorbent core 31 can be made more conspicuous. The user can further grasp the convex deformation of the absorbent core 31 toward the body side by the decorative part 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
At least a part of the crotch stretch unit 41 may overlap the low basis weight portion 33. The absorbent core 31 deforms at the low basis weight portion 33 extending in the front-rear direction as a base point when worn. This allows the absorbent core 31 to be more easily deformed into a convex shape toward the body by contraction of the crotch stretch unit 41, and the absorbent core 31 can be appropriately accommodated in the crotch of the wearer. The low basis weight portion 33 serving as a deformation base point of the absorbent core 31 has a lower basis weight than that of the surrounding region, and can be suppressed in thickness even after absorption of body fluid, thereby maintaining the deformed state. The user can further grasp that the absorbent core 31 has been deformed into a convex shape toward the body side, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 even before use, and can obtain a feeling of comfort that the diaper is fitted to the crotch portion.
The crotch stretch unit 41 may be disposed outside the central high-rigidity portion 71 in the width direction W. By contraction of the crotch stretch unit 41, the region outside the central high rigidity unit 71 in the width direction W can be lifted toward the body. This makes it easy for the vicinity of the low basis weight portion 33 to become convex toward the body. In addition, the central high rigidity portion 71 is less likely to be contracted by the crotch stretch unit 41. This can ensure an absorption area, maintain a convex shape along the crotch, and reduce leakage. The user can further grasp that the absorbent core 31 has been deformed into a convex shape toward the body side, and can more easily obtain a feeling of security against leakage.
At least one of the front end edge 33F and the rear end edge 33R of the low basis weight portion 33 may extend outward in the front-rear direction L with respect to the crotch stretch portion 41, and the decorative portion 81 may be disposed over the entire area of the low basis weight portion 33 in the front-rear direction L. That is, the front end edge 81F of the decorative portion 81 may be located on the front side of the front end edge 33F of the low basis weight portion 33, and the rear end edge 81R of the decorative portion 81 may be located on the rear side of the rear end edge 33R of the low basis weight portion 33.
As shown in fig. 3, the disposable diaper includes a region R11 in which the low basis weight section 33 and the crotch stretch section 41 are arranged in the front-rear direction, and a region R12 in which the low basis weight section 33 extends outward in the front-rear direction L with respect to the crotch stretch section 41. The region in which the low basis weight portion 33 and the crotch stretch unit 41 are arranged in the front-rear direction is a region in which the low basis weight portion 33 and the crotch stretch unit 41 overlap in the width direction or the thickness direction T, and a deformation base point by the low basis weight portion 33 is formed and is lifted toward the body side by contraction of the crotch stretch unit 41. The region R12 where the low basis weight portion 33 protrudes outward in the front-rear direction with respect to the crotch stretch unit 41 is a region where the low basis weight portion 33 and the crotch stretch unit 41 do not overlap in the width direction or the thickness direction T, and although a deformation origin point by the low basis weight portion 33 is formed, contraction of the crotch stretch unit 41 hardly acts. Thereby, the deformation state of the absorbent core 31 in the two regions is liable to be different. Since the decorative portion 81 is provided so as to span two regions, it is easy for the user to grasp different deformation forms. Depending on the form of deformation of the absorbent core 31, the orientation of the diaper in the front-back direction and the position of the diaper in the front-back direction as a whole can be grasped, and it is easy to grasp whether or not the diaper is worn properly on the body.
The crotch stretch unit 41 and the decorative unit 81 may be disposed across the center 10LC in the front-back direction of the disposable diaper. Since both the crotch stretch unit 41 and the decorative unit 81 straddle the center 10LC in the front-rear direction of the disposable diaper, the user can easily grasp whether the absorbent core 31 is deformed to a convex shape toward the body side, regardless of whether the front side or the rear side of the disposable diaper is visually recognized.
The decorative portion 81 may have a length in the front-rear direction longer than the length in the front-rear direction of the crotch stretch unit 41. The longitudinal length of the crotch stretch unit 41 is the longitudinal length of the crotch stretch unit 41 in the region overlapping with the absorbent core. The decorative portion 81 is more noticeable, and the user can easily grasp the convex shape of the absorbent core 31 toward the body side by the decorative portion 81. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
The decorative portion 81 has: a front extension portion 811 extending forward relative to the crotch stretch unit 41; and a rear extension portion 812 extending rearward with respect to the crotch stretch unit 41, wherein a length L811 in the front-rear direction of the front extension portion 811 may be longer than a length L812 in the front-rear direction L of the rear extension portion 812. The front extension portion 811 and the rear extension portion do not contract in the front-rear direction due to contraction of the crotch stretch unit 41, and visibility is easily ensured. In general, when the wearing state of the diaper is confirmed, the front side of the wearer is visually recognized. When confirming the wearing state of the diaper, the user can easily visually recognize the front extension 811, and can easily grasp whether or not the diaper is worn properly on the body.
The decorative portion 81 may have a longer length in the width direction than the crotch stretch unit 41. The decorative portion 81 is more noticeable, and the user can easily grasp the convex shape of the absorbent core 31 toward the body side by the decorative portion 81. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion. In the case where the decorative portion 81 and the crotch stretch unit 41 are formed of a plurality of aggregates, the width direction length of the decorative portion 81 and the width direction length of the crotch stretch unit 41 are equal to one width.
The pair of crotch stretch units 41 are disposed in a region between the pair of decorative portions 81. The crotch stretch unit 41 and the decorative unit 81 are disposed on both sides of the center in the width direction of the disposable diaper 10. The decorative portion 81 is disposed across the crotch stretch unit 41 in the width direction, and the deformation state caused by the contraction of the crotch stretch unit 41 can be made more conspicuous. The user can further grasp that the absorbent core 31 has been deformed into a convex shape toward the body side, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
The decorative portion 81 may have a convex shape bulging inward in the width direction. When wearing a belt-type disposable diaper, the buttocks are placed on the back waist region, the diaper is pulled toward the crotch region, and the body is covered with the crotch region. At this time, the decorative portion 81 is curved, and therefore, the user can easily grasp the position in the front-rear direction of the entire diaper by the shape of the decorative portion 81. The user can pull the diaper to an appropriate position and wear the diaper, and can wear the diaper at a more appropriate position.
The deformation base point portion may extend rearward and outward in the width direction in a region located rearward of the crotch stretch unit 41 and between the pair of decorative portions 81. When the tape type disposable diaper 10 is worn, first, the buttocks of the wearer are placed in the rear waistline region S2 of the disposable diaper 10 in a state where the disposable diaper 10 is unfolded. Then, the disposable diaper 10 is passed between the legs of the wearer, and pulled toward the crotch region side, thereby covering the body with the crotch region. At this time, the disposable diaper is pulled in the front-rear direction, and the absorbent core 31 is easily deformed with the deformation origin portions 85 as origin points. The deformation origin point portion 85 is provided on the rear side of the crotch stretch unit 41 located in the crotch region, and forms a deformation origin point of the absorbent core 31 on the rear side of the crotch stretch unit 41. The deformation origin portions 85 extend outward in the width direction W toward the rear side, and form deformation origin points extending inward in the width direction W from the rear waistline region toward the crotch region in the absorbent core 31.
Thus, when the buttocks are placed on the back waist region and the diaper is pulled toward the crotch region, the absorber is deformed by the base point extending inward in the width direction W from the back waist region toward the crotch region. Specifically, as shown in fig. 7, the absorbent body in the region where the deformation base point portions 85 are provided is deformed with the outer edge 72E of the high rigidity portion 72 (the base point edge 85E of the deformation base point portions 85) as a base point, and the region on the inner side in the width direction W than the outer edge 72E is arranged on the skin surface side than the region on the outer side in the width direction W than the outer edge 72E. The reason why the region on the inner side in the width direction W than the outer edge 72E is disposed on the skin surface side than the region on the outer side in the width direction W than the outer edge 72E is that the center in the width direction W of the absorbent core 31 is pulled up toward the body side by contraction of the crotch stretch unit 41, and a force is generally applied to the center in the width direction W of the absorbent core 31 when the wearer pulls the diaper, so that the center in the width direction W of the absorbent core 31 is pulled up in a state where the outer side portion (for example, the vicinity of the leg hole opening portion) of the absorbent article is hooked on the leg during wearing. The absorbent core 31 deforms so as to shorten the length in the width direction W toward the crotch region side by deforming with the deformation base point portions 85 as base points.
As shown in fig. 6 and 8, the absorbent core 31 located at the front side of the deformation base point portions 85 is deformed into a convex shape toward the body side by contraction of the pair of crotch stretch units 41, and the central region R32 rises up with respect to the side regions R31. This allows the absorbent core 31 in the crotch region to be arranged along the body, and the absorbent core 31 can be appropriately accommodated in the crotch of the wearer.
The decorative portion 81 is disposed with the deformation base point portions 85 and the crotch stretch unit 41 in between, and can make the portion of the absorbent core 31 deformed into a convex shape more conspicuous. Thus, the user can easily grasp the convex shape of the absorbent core 31 toward the body side by the decorative portion 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
The color difference Δ E between the indicator portion and the decorative portion 81 may be 3.0 or more. Various discussions have been repeated by the applicant, and as a result, it has been found that: in general, when the color difference Δ E is 3.0 or more, the user can easily recognize the two regions as independent regions. The user can easily distinguish the indication part and the decoration part 81. The user can easily grasp the convex deformation of the absorbent core 31 toward the body side by the decorative portion 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
Further, two points (two regions) to be measured are subjected to colorimetry using a commercially available colorimeter, and values obtained by numerical conversion based on CIE1976(L × a × b) color space defined in JIS Z8729 are compared to determine "color difference". Specifically, when the difference between L and a between two points to be measured is Δ L, the difference between a and b is Δ a, and the difference between b is Δ b, the passing color difference Δ E is [ (Δ L) }2+(Δa*)2+(Δb*)2]1/2And (4) obtaining.
The hue number of the color of the indicator portion 51 and the hue number of the color of the decorative portion 81 may be shifted by 2 or more in a color chart of 24 colors classified by the ostwald color circle. The user can easily distinguish the indication part and the decoration part 81. The user can easily grasp the convex deformation of the absorbent core 31 toward the body side by the decorative portion 81, and can more easily obtain a feeling of security against leakage. The user can easily visually recognize the crotch stretch unit 41 through the decorative unit 81 even before use, and can obtain a feeling of comfort that the diaper is fit to the crotch portion.
(5) Modification example
Next, a disposable diaper 10A according to a modification will be described. Fig. 8 is a schematic plan view of a disposable diaper 10A according to a modification as viewed from the non-skin surface side. In the following description of the modified examples, only the configurations different from the above-described embodiment will be described, and the same reference numerals are used for the same configurations as those of the embodiment, and the description thereof will be omitted.
The crotch stretch unit 41A of the disposable diaper of modification 1 is disposed so as not to straddle the center 10LC of the disposable diaper 10 in the front-rear direction L. The crotch stretch unit 41A may be disposed only on the rear side of the center 10LC in the front-rear direction of the disposable diaper. The decorative portion 81A is disposed across the center 10LC in the front-rear direction of the disposable diaper. The crotch stretch unit is disposed only on one side with respect to the center in the front-back direction of the diaper, and therefore the front and back appearances of the diaper can be made different. The user can easily grasp the orientation of the diaper in the front-rear direction and the position of the diaper in the front-rear direction as a whole, and whether or not the diaper is worn properly on the body.
The decorative portion 81A has a curved shape in which the center side in the front-rear direction protrudes inward in the width direction. The decorative portion 81A of modification 1 has a longer length in the width direction than the decorative portion 81 of the embodiment, and the decorative portion 81A of modification 1 has a single belt shape. The distance W11 between the crotch stretch unit and the decorative portion 81A on one side with respect to the widthwise center 10WC of the disposable diaper is different from the distance W12 between the crotch stretch unit 41A and the decorative portion 81A on the other side with respect to the widthwise center of the disposable diaper. Further, the distance between the decorative portion and the crotch stretch portion in the curved shape is the distance at the closest portion as in the modification.
When the absorbent core 31 is deformed into a convex shape toward the body side by contraction of the crotch stretch unit 41A, the vicinity of the crotch stretch unit which becomes a deformation point may be difficult to visually recognize from the non-skin surface side of the diaper. Since the distance between the crotch stretch unit 41A and the decorative portion 81A on one side with respect to the center in the width direction of the diaper is different from the distance between the crotch stretch unit 41A and the decorative portion 81A on the other side in the width direction of the diaper, the visibility of the decorative portion 81A on the other side can be easily ensured even when the visibility of the decorative portion 81A on one side is difficult to ensure. Thus, the user can easily grasp the convex deformation of the absorbent core 31 toward the body side by the decorative portion 81A, and can easily obtain a feeling of security against leakage. Even before use, the user can easily visually recognize the crotch stretch unit 41A through the decorative unit 81, and can obtain a feeling of security that the diaper is fit to the crotch portion.
The disposable diaper 10A of modification 1 does not have the low basis weight portion 33. The absorbent core 31 is lifted up with respect to the crotch of the wearer by contraction of the crotch stretch unit 41, and is fitted to the crotch.
The measurement of "the weight per unit area of the absorbent core" in the present specification is a measurement by the following measurement method. When the disposable diaper 10 is sealed in a package or the like, the disposable diaper 10 is taken out from the package, left to stand in an atmosphere of 20 ℃ ± 2 ℃ and a relative humidity of 60% ± 5% RH for 12 hours in this state, and a sample thus left to stand for 12 hours is used. In a disposable diaper packaged with a packaging sheet or the like, the packaging sheet is opened to unfold the folded disposable diaper. Next, a portion whose weight per unit area is to be measured is cut out from the disposable diaper, and a portion other than the absorbent core, such as a topsheet, is removed from the cut-out portion. Then, the area and weight of the portion where the weight per unit area of the absorbent core is to be measured are measured. The weight per unit area was calculated based on the weight and the area.
The "flexural rigidity" in the present specification may be a value measured by the gurley stiffness. The measurement of the Gurley stiffness can be carried out by using a Gurley softness tester No311 manufactured by Anthemis Seiko K.K. according to JIS-L1096. The length of the specimen in the width direction W in the measurement of the gurley stiffness can be set to 30mm, and the length in the front-rear direction can be set to 25 mm.
The present invention has been described in detail with reference to the above embodiments, but 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 embodied in modified forms and modified forms without departing from the spirit and scope of the present invention defined by the claims. Therefore, the description of the present invention is for illustrative purposes, and the present invention is not limited thereto.
In addition, the entire contents of japanese utility model registration No. 2018-3144 filed on 8/14 in 2018 are incorporated in the present specification by reference.
Industrial applicability
According to the present invention, a disposable diaper can be provided: the fit to the body is improved, and the user can easily grasp that the absorbent core is deformed to a convex shape toward the body side, and feel a feeling of security against leakage is obtained.

Claims (20)

1. A disposable diaper, comprising:
a front-back direction and a width direction orthogonal to each other;
a front waistline region, a back waistline region, and a crotch region disposed between the front waistline region and the back waistline region;
an absorbent core disposed at least in the crotch region; and
a pair of crotch stretch units which stretch and contract in the front-back direction in a region overlapping with the absorbent core in the crotch region,
the crotch stretch unit is disposed on the non-skin surface side of the absorbent core,
a decorative part is provided along the crotch stretch part in the vicinity of the crotch stretch part or in a part overlapping with the crotch stretch part.
2. The disposable diaper according to claim 1,
the disposable diaper comprises: a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core; and
an exterior sheet disposed on the non-skin surface side of the back sheet,
the decorative portion is provided on a non-skin surface of the back sheet,
the crotch stretch unit is disposed between the back sheet and the exterior sheet.
3. The disposable diaper according to claim 2,
the disposable diaper comprises:
a joining region in which the back surface sheet and the exterior sheet are joined;
and a non-joined region which is adjacent to the joined region and in which the back surface sheet and the exterior sheet are not joined,
at least a part of the crotch stretch unit and at least a part of the decorative unit are disposed in the joining region.
4. The disposable diaper according to claim 1,
the disposable diaper has a liquid-impermeable back sheet disposed on the non-skin surface side of the absorbent core,
the crotch stretch unit is disposed between the back sheet and the absorbent core.
5. The disposable diaper according to any one of claims 1 to 4,
a pair of low-basis-weight portions extending in the front-back direction and arranged at intervals in the width direction are provided in the absorbent core in the crotch region,
at least a part of the crotch stretch unit overlaps with the low basis weight unit.
6. The disposable diaper according to claim 5,
at least one of a front end edge and a rear end edge of the low basis weight portion extends outward in the front-rear direction with respect to the crotch stretch portion,
the decorative portion is disposed over the entire area of the low basis weight portion in the front-rear direction.
7. The disposable diaper according to any one of claims 1 to 4,
the crotch stretch unit and the decorative unit are disposed across the center of the disposable diaper in the front-rear direction.
8. The disposable diaper according to any one of claims 1 to 4,
the crotch stretch unit is not disposed across the center of the disposable diaper in the front-rear direction,
the decorative portion is disposed across the center of the disposable diaper in the front-rear direction.
9. The disposable diaper according to any one of claims 1 to 4,
the decorative portion has a length in the front-rear direction that is longer than a length in the front-rear direction of the crotch stretch unit.
10. The disposable diaper according to any one of claims 1 to 4,
the decorative part has: a front extension portion that extends forward relative to the crotch stretch portion; and a rear extension portion extending rearward relative to the crotch stretch portion,
the front-rear direction length of the front protruding portion is longer than the front-rear direction length of the rear protruding portion.
11. The disposable diaper according to any one of claims 1 to 4,
the decorative portion has a length in the width direction that is longer than a length in the width direction of the crotch stretch unit.
12. The disposable diaper according to any one of claims 1 to 4,
the decoration parts are a pair of decoration parts which are arranged at intervals along the width direction,
the pair of crotch stretch units are disposed in a region between the pair of decorative units.
13. The disposable diaper according to claim 12,
the distance between the crotch stretch unit and the decorative portion on one side with respect to the center in the width direction of the disposable diaper is different from the distance between the crotch stretch unit and the decorative portion on the other side with respect to the center in the width direction of the disposable diaper.
14. The disposable diaper according to claim 12,
an indication part extending along the front-rear direction is provided in a region between the pair of decorative parts,
the color difference Delta E between the indicator and the decorative part is 3.0 or more.
15. The disposable diaper according to claim 12,
an indication part extending along the front-rear direction is provided in a region between the pair of decorative parts,
the hue number of the color of the indication part and the hue number of the color of the decoration part are staggered by more than 2 in a color chart of 24 colors classified by an Ostwald color circle.
16. The disposable diaper according to any one of claims 1 to 4,
the disposable diaper is a pants-type disposable diaper.
17. The disposable diaper according to claim 12,
the disposable diaper is a tape-type disposable diaper.
18. The disposable diaper according to claim 17,
the decorative portion has a convex shape bulging inward in the width direction.
19. The disposable diaper according to claim 17,
a pair of deformation base point portions arranged at a distance from each other in the width direction are provided in the absorbent core,
the deformation base point portion extends rearward and outward in the width direction in a region located rearward of the crotch stretch unit and between the pair of decorative portions.
20. The disposable diaper according to any one of claims 1 to 4,
the entire crotch stretch unit and the entire decorative unit extend in the front-rear direction.
CN201921316648.4U 2018-08-14 2019-08-14 Disposable diaper having a disposable diaper Active CN211271686U (en)

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JP7113001B2 (en) * 2019-12-27 2022-08-04 ユニ・チャーム株式会社 absorbent article
JP7145842B2 (en) * 2019-12-27 2022-10-03 ユニ・チャーム株式会社 Absorbent articles and absorbent article packages
WO2021117910A1 (en) * 2019-12-27 2021-06-17 ユニ・チャーム株式会社 Absorbent article and package for absorbent article
JP7463742B2 (en) * 2020-01-29 2024-04-09 王子ホールディングス株式会社 Absorbent articles
JP7463743B2 (en) * 2020-01-29 2024-04-09 王子ホールディングス株式会社 Absorbent articles
JP7484188B2 (en) * 2020-01-29 2024-05-16 王子ホールディングス株式会社 Absorbent articles
WO2024004417A1 (en) * 2022-06-27 2024-01-04 ユニ・チャーム株式会社 Diaper

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JPH0621463Y2 (en) * 1988-07-06 1994-06-08 本州製紙株式会社 Disposable diapers
US8628506B2 (en) * 2008-06-30 2014-01-14 Kimberly-Clark Worldwide, Inc. Multifunctional monitoring device for absorbent articles
GB201022031D0 (en) * 2010-12-23 2011-02-02 Sca Hygiene Prod Ab Absorbent article comprising a liquid discharge detection sensor
JP5249458B1 (en) * 2012-09-28 2013-07-31 ユニ・チャーム株式会社 Disposable diapers
JP5255150B1 (en) * 2012-11-09 2013-08-07 ユニ・チャーム株式会社 Disposable diapers
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