CA2026495C - Disposable diapers - Google Patents

Disposable diapers Download PDF

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Publication number
CA2026495C
CA2026495C CA002026495A CA2026495A CA2026495C CA 2026495 C CA2026495 C CA 2026495C CA 002026495 A CA002026495 A CA 002026495A CA 2026495 A CA2026495 A CA 2026495A CA 2026495 C CA2026495 C CA 2026495C
Authority
CA
Canada
Prior art keywords
liquid
area
wing areas
areas
front area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CA002026495A
Other languages
French (fr)
Other versions
CA2026495A1 (en
Inventor
Masamitsu Yamamoto
Noriyuki Kimura
Yoshihisa Fujioka
Hiroki Yamamoto
Makoto Suekane
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unicharm Corp
Original Assignee
Unicharm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=17367433&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2026495(C) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Unicharm Corp filed Critical Unicharm Corp
Publication of CA2026495A1 publication Critical patent/CA2026495A1/en
Application granted granted Critical
Publication of CA2026495C publication Critical patent/CA2026495C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
    • 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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49406—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region
    • A61F13/4946—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the crotch region the edge leakage prevention means being an absorbent medium
    • 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
    • A61F13/494—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means
    • A61F13/49466—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterised by edge leakage prevention means the edge leakage prevention means being at the waist region
    • 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
    • A61F13/5622—Supporting or fastening means specially adapted for diapers or the like
    • A61F13/565—Supporting or fastening means specially adapted for diapers or the like pants type diaper
    • 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
    • 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
    • A61F13/49007—Form-fitting, self-adjusting disposable diapers
    • A61F13/49009—Form-fitting, self-adjusting disposable diapers with elastic means
    • A61F13/49011—Form-fitting, self-adjusting disposable diapers with elastic means the elastic means is located at the waist region
    • 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
    • A61F13/491—Absorbent articles specially adapted to be worn around the waist, e.g. diapers specially adapted for gender distinct urine discharge pattern
    • 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
    • A61F2013/49088—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the leg opening
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51409—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film
    • A61F2013/51411—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film being impervious to fluids but not for air or vapours
    • 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
    • A61F13/514—Backsheet, i.e. the impermeable cover or layer furthest from the skin
    • A61F13/51401—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material
    • A61F2013/51409—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film
    • A61F2013/51411—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film being impervious to fluids but not for air or vapours
    • A61F2013/51421—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a film being impervious to fluids but not for air or vapours only in special places

Abstract

Here is disclosed a disposable diaper having a front area, a crotch area, a back area and a pair of liquid permeable wing areas laterally extending from opposite sides of said back area so that said diaper may be worn by fastening said wing areas to each other, then placing said front area upon these wing areas and fastening said front area to said wing areas.

Description

~;~~~1~~~~~J
DISPOSABLE DIAPERS
BACKGROUND OF THE INVENTION
This invention relates 'to disposable diapers adapted to receive excretions and more particularly to such disposable diapers suitable for adult users.
Most of conventionally available diapers for adult users is characterized in its substantially T-shaped configuration as a whole defined by a bark area and a pair of wing areas laterally extending from opposite sides of the back area.
Diapers of such configuration are generally classified into two types concerning the sequence for wearing them when the wearer is in bed.
With the first type, an attendant places a back area of a diaper on the rear waist of the wearer, places a crotch area thereof on the crotch of the wearer with a front area thereof being held in hand, places said front area on the belly of the wearer and finally places and fastens said wing areas one on another over the belly o:E the wearer. Most of conventional diapers are of this first type so far as the sequence for wearing is concerned.
With the second type, the attendant places a back area of a diaper on the rear waist of the wearer, fastens wing areas thereof one on another over the belly of the wearer, places a crotch area 'thereof on the crotch of the wearer with a front area thereo:E held in hand, places said front area on the belly of the wearer so as to cover said wing areas and finally fastens said front area onto said wing areas.
Concerning the ease fox diaper to be worn, the latter is better than the former, becauss~, with the latter type, the diaper is fastened around the waist of the wearer at the intermediate step of wearing by coupling said wing areas to one another over the belly of the wearer and the diaper can be worn by the wearer him- or herself who stands up.
With the latter type, however, an absorbent core located in said front area would not be effectively utilized for absorption of liquid excretions since a liquid-impermeable backsheet extends 'the entire diaper including said wing areas. Specifically, said front area is placed upon said wing areas having the liquid-impermeable backsheet and these wing areas form a barrier against permeation of liquid excretions into said front area. When said front area is not effectively utilized for absorption of liquid excretions in this manner, a liquid absorption capacity in said front area will be insufficient to avoid undesirable leakage of liquid excretions, particularly when the wearer is adult. Leakage due to such insufficient liquid absorption capacity in said front area often occurs particularly when the wearer is male or when the wearer is female and laying on her own side on the bed.
It is an object of the invention to provide disposable diapers which are of the foregoing second type but constructed so that the front area of diaper also has a sufficient liquid absorption capacity.
SUMMARY OF THE INVENTION
The object set forth above is achieved, in accordance with the invention, by a disposable diaper having a front area, and back area and a crotch area therebetween, said diaper comprising:
a liquid-permeable topsheet covering said front, back and crotch areas;
a liquid-impermeable backsheet covering said front, back and crotch areas;
a liquid-absorbent core disposed between said topsheet and said backsheet;
a pair of wing areas laterally extending from opposite sides of said back area so that said diaper is worn by fastening said wing areas to each other, then placing said front area upon said wing areas and fastening said front area to said wing areas, and fastening means being provided for fastening said front area to said wing areas;
wherein said wing areas have a liquid permeablility in a thickness direction of said wing areas.
In a preferred embodiment, said wing areas are constructed from a liquid-permeable topsheet, a liquid-permeable backsheet and a liquid-absorbent core between these sheets.
In another preferred embodiment, wherein each of said wing areas comprises a liquid-permeable topsheet and a liquid-permeable backsheet, a liquid absorption capacity per m2 of said liquid-absorbent core in said front area being adjusted to be higher than those in said back and crotch areas.
According to the invention, although the wearing sequence corresponds to the foregoing second type, i.e., the wing areas are folded on each other and thereafter the front area is folded on these wing areas, the portion of the liquid absorbent core occupying the front area satisfactorily absorbs the quantity of liquid excretions having permeated through said wing areas, since said wing areas are liquid-permeable.
When the wing areas also are provided therein with the liquid absorbent core, liquid excretions are absorbed not only by the portion of the liquid absorbent core occupying said front area but also by the portion of the liquid absorbent core occupying these wing areas.
Consequently, the front area is effectively utilized for absorption of liquid excretions, eliminating the problem of prior art that the insufficient liquid absorption capacity causes the undesirable leakage of liquid excretions.
Particularly when the wearer is male or when the wearer is female and laying on her own side on the bed, a sufficient liquid absorption capacity can be assured in the front area.
The invention is based on the previously mentioned second type of conventional disposable diapers for adult users adapted to be worn folding fastened the wing areas on each other to immobilize a diaper around the waist of the wearer, followed by folding the front area on these wincJ
areas. Therefore, the diaper can be easily and reliably worn with help of the attendant or even by the wearer him-or herself. Furthermore, the attendant can check whether there are excretions or not simply by opening the front area leaving the wing areas fastened to each other so as to prevent the diaper from any displacement from its initial position and, after chec)cing, can rapidly fold the front area back onto the wing areas.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a developed plan view partially broken away of an embodiment of the invention as viewed toward the inner side (upper side) thereof;
Fig. 2 is a view similar to Fig. 1 as viewed toward the outer side (lower side) thereof;
Fig, 3 is a sectional view taken along a. line III - III
in Fig. 1;
Fig. 4 is a perspective view of such diaper at an intermediate step of its wearing sequence; and Fig. 5 is a view similar to Fig. 1 of another embodiment of the invention.
r~ n <~~~~~~~
PREFERRED EMBODIMENTS
The invention will be described by way of example in reference with the accompanying drawings.
Referring to Figs 1 through 4, a diaper proper 1 has a front area 2, a crotch area 3, a back area 4, arid a pair of wing areas 5 laterally extending from opposite sides of the back area 4. The diaper~proper 1 comprises a first liquid-permeable topsheet 6 covering the front area 2, the crotch area 3 and the back area 4, second liquid-permeable topsheets 7 covering the wing areas 5, a first liquid-impermeable backsheet 8 covering the front area 2, the crotch area 3 and the back area 4, second liquid-impermeable backsheets 9 covering the wing areas 5, a first liquid absorbent core 10 sandwiched,centrally between the first topsheet 6 and the first backsheet 8 and second liquid absorbent cores 11 sandwiched between the respective second topsheets 7 .and the respective second backsheets 9.
Each of the second cores 11 is thinner than the first core and may be also integrally with sand first core 10 although the second cores 11 are shown as being formed separately of the first core 10. The second topsheets 7 are joined to the first topsheet 6 by respective side sheets 13 and the second backsheets 9 are joined directly to the first backsheet 8, respectively, with use of suitable adhesive or welding means. The second backsheets 9 are provided with fine perforations 12. haterally opposite sides of the top-and backsheets 6, 8 and the first core 10 are inwardly curved along 'the crotch area 3. The first core 10 laterally extends in the back area ~ and defines a substantially T-shape.
On an upper surface of the diaper proper 1, i.e., on an upper surface of the topsheet 6, in a longitudinally central zone thereof, 'there are provided a pair of elastic narrow sidesheets 13 so as to be opposed to both sides of 'the front area 2, the crotch area 3 and the back area 4, and outer sides of the respective sidesheets 13 are joined to the upper surface of the topsheet 6. The sidesheets 13 are endowed with their elasticity by elastic members 14 wrapped in inner edge sleeves 13' of the respective sidesheets'13.
While the respective sidesheets 13 are shown with inner ends thereof being collapsed outward and joined onto the topsheet 6, it is also possible to collapse said inner ends inward and to join them onto the topsheet 6 or to collapse one end inward and the other end outward and to join them onto the topsheet 6.
The diaper proper 1 is provided with elastic members 15 extending along the opposite edges in the crotch area 3 and with an elastic member 16 extending along the upper edge of the back area 4, both elastic members 15, 16 being ~~~~ ~~~~e:i sandwiched between the~top- and backsheets 6, 8.
The diaper proper 1 is further provided at four corners in the front area 2 with pressure sensitive tapes 17, respectively, and at an upper corner in one of the wing arEas 5 with a pressure sensitive tape 18.
Referring to Fig. 5, another embodiment of the invention having none of the second cores 11 is shown.
Remainder of the construction is similar to the previous embodiment. In this embodiment, however, it is also possible to construct each of 'the wing areas from a single layer of porous sheet. It is preferred in this embodiment that the first core 10 has weight per m2 heavier in 'the front area 2 than in the other areas to assure a sufficient liquid absorption capacity.
Obviously, contour of the diaper proper 1 in the front area 2 and the wing areas 5 may be other than those as shown.
Preferably, the first and second topsheets 6, 7 are made of nonwoven fabric, the first backsheet 8 is made of plastic film, the second backsheet 9 is made of open plastic film or open nonwoven fabric, the first and second cores 10, 11 are made of fluffy pulp and super-absorptive polymer particles, and the sidesheets 13 are made of nonwoven fabric. However, particular materials are not critical.
Now a sequence in which a disposable diaper constructed _ g _ ~.r ~~ i~ ~, 1X
as has been mentioned according to the invention will be described. The attendant places the back area 4 on the back waist of the wearer, then folds the wing areas 5 on each other so that the one wing area 5 having the tape fastener 18 overlies 'the other wing area 5 over the belly of the wearer and secures the 'tape fastener 18 to the other wing area 5. Thereafter the attendant places the crotch area 3 on the crotch of the wearer with 'the front area 2 being held in hand and places the front area 2 over the belly of the wearer so as to cover the wing areas 5. Finally, the attendant secures the tape .fasteners 17 of said front area to said wing areas.
When a diaper of the invention is worn by the wearer him- or herself, the sequence as has been mentioned may be followed by the wearer who is standing up.
_ g _

Claims (3)

1. A disposable diaper having a front area, and back area and a crotch area therebetween, said diaper comprising:
a liquid-permeable topsheet covering said front, back and crotch areas;
a liquid-impermeable backsheet covering said front, back and crotch areas;
a liquid-absorbent core disposed between said topsheet and said backsheet;
a pair of wing areas laterally extending from opposite sides of said back area so that said diaper is worn by fastening said wing areas to each other, then placing said front area upon said wing areas and fastening said front area to said wing areas, and fastening means being provided for fastening said front area to said wing areas;
wherein said wing areas have a liquid permeablility in a thickness direction of said wing areas.
2. The disposable diaper as recited in Claim 1, wherein each of said wing areas comprises a liquid-permeable topsheet, a liquid-permeable backsheet and a liquid-absorbent core disposed therebetween.
3. The disposable diaper as recited in Claim 1, wherein each of said wing areas comprises a liquid-permeable topsheet and a liquid-permeable backsheet, a liquid absorption capacity per m2 of said liquid-absorbent core in said front area being adjusted to be higher than those in said back and crotch areas.
CA002026495A 1989-10-05 1990-09-28 Disposable diapers Expired - Lifetime CA2026495C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1-261837 1989-10-05
JP1261837A JP2536935B2 (en) 1989-10-05 1989-10-05 Disposable diapers

Publications (2)

Publication Number Publication Date
CA2026495A1 CA2026495A1 (en) 1991-04-06
CA2026495C true CA2026495C (en) 2001-10-30

Family

ID=17367433

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002026495A Expired - Lifetime CA2026495C (en) 1989-10-05 1990-09-28 Disposable diapers

Country Status (8)

Country Link
US (1) US5069678A (en)
EP (1) EP0421473B2 (en)
JP (1) JP2536935B2 (en)
KR (1) KR960001478Y1 (en)
AU (1) AU637829B2 (en)
CA (1) CA2026495C (en)
DE (1) DE59010691D1 (en)
GB (1) GB2236663B (en)

Families Citing this family (94)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454803A (en) * 1989-07-18 1995-10-03 The Procter & Gamble Company Absorbent article having inflected barrier cuffs
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EP0421473B2 (en) 2000-02-02
GB9021592D0 (en) 1990-11-21
US5069678A (en) 1991-12-03
KR910006881U (en) 1991-05-27
AU6378490A (en) 1991-04-11
EP0421473A2 (en) 1991-04-10
JPH03123550A (en) 1991-05-27
JP2536935B2 (en) 1996-09-25
DE59010691D1 (en) 1997-05-07
AU637829B2 (en) 1993-06-10
CA2026495A1 (en) 1991-04-06
EP0421473A3 (en) 1992-08-26
KR960001478Y1 (en) 1996-02-17
GB2236663B (en) 1993-09-01
GB2236663A (en) 1991-04-17
EP0421473B1 (en) 1997-04-02

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