IE51061B1 - Disposable diapers - Google Patents
Disposable diapersInfo
- Publication number
- IE51061B1 IE51061B1 IE2505/80A IE250580A IE51061B1 IE 51061 B1 IE51061 B1 IE 51061B1 IE 2505/80 A IE2505/80 A IE 2505/80A IE 250580 A IE250580 A IE 250580A IE 51061 B1 IE51061 B1 IE 51061B1
- Authority
- IE
- Ireland
- Prior art keywords
- pad
- sheet
- disposable diaper
- density
- diaper
- Prior art date
Links
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
- 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
- A61F13/49413—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 upstanding barrier
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F13/537—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer
- A61F13/53708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction
- A61F13/53713—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad characterised by a layer facilitating or inhibiting flow in one direction or plane, e.g. a wicking layer the layer having a promotional function on liquid propagation in at least one direction the layer having a promotional function on liquid propagation in the vertical direction
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—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
-
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15365—Dimensions
- A61F2013/15373—Calliper, i.e. thickness
-
- 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
- A61F13/15203—Properties of the article, e.g. stiffness or absorbency
- A61F2013/15284—Properties of the article, e.g. stiffness or absorbency characterized by quantifiable properties
- A61F2013/15422—Density
- A61F2013/1543—Density with a density gradient in the horizontal plane
-
- 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
- A61F2013/4512—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 folded in special shape during use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
- A61F13/49—Absorbent articles specially adapted to be worn around the waist, e.g. diapers
- A61F2013/49068—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the shape of the outline
- A61F2013/49076—Absorbent articles specially adapted to be worn around the waist, e.g. diapers characterized by the shape of the outline as "I"-shaped
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F2013/530131—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
- A61F13/534—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad
- A61F2013/53445—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having an inhomogeneous composition through the thickness of the pad from several sheets
Landscapes
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
An absorbent article comprising, a backing sheet of fluid impervious material, a fluid pervious cover sheet, and a first pad adjacent the cover sheet comprising a loosely formed fibrous mass. The article has a separate second pad intermediate the first pad and the backing sheet, with the second pad comprising a mass of fibres having compressed regions extending throughout a substantial part of the second pad. The average interfibre spacings in the second pad are substantially less than the average interfibre spacings in the first pad, such that the second pad rapidly transmits body fluids to remote locations of the second pad for retention in the areas at a location spaced from the cover sheet.
Description
The present invention relates to disposable diapers.
Various disposable absorbent articles have been proposed for use in receiving and retaining body fluids. Such articles, e.g. disposable diaper, have normally been constructed with a fluid impervious backing sheet, a fluid pervious cover or top sheet, and an absorbent pad intermediate the backing and cover sheets, such as comminuted wood pulp termed in the art as fluff. Although increasingly popular due to disposability, certain problems associated with the absorbent pads remain and these problems prevent the articles from being totally satisfactory.
First, it is necessary that the pads should be such that body fluids will spread rapidly through the pad from the point of application toward remote locations of the pad in order to minimize pad saturation in localized areas and make maximum use of the capacity of the pad.
Second, it is desirable that the pads prefererttially retain the body fluids at locations spaced from the cover sheet in order to minimize back wetting through the cover sheet with attendant discomfort to the wearer. Third, the pads should be soft and conformable to the shape of the wearer in order to provide a proper fit of the articles and maximum comfort. Finally, the pads should be made in accordance with simplified manufacturing techniques in order to reduce the cost of the disposable articles to the consumer.
In Irish Patent Specification No. 45552 there is disclosed, in a disposable absorbent article, having a fluid impervious back sheet and a fluid pervious top sheet, a pad assembly comprising a first loosely formed bat adjacent the cover sheet and a second bat or pad between the first pad and the backing sheet, the second pad having compressed regions throughout a substantial part of the second pad and also having uncompressed areas adjacent said compressed regions. Such a pad is functionally superior to a conventional single pad type disposable product.
In U.S. Patent No. 3 612 055 there is disclosed a single pad diaper construction wherein the one surface not in contact with the top sheet is processed to form a paper-like skin to effect fluid spread to the backside of the diaper.
A principal feature of the present Invention is the provision of an absorbent article of simplified construction having improved fluid dispersing and retention capabilities.
According to the present invention a disposable diaper in a longitudinally oriented box-pleated configuration, or a generally hour-glass or waisted shape comprises a backing sheet of fluid impervious material, a fluid pervious cover sheet, a first absorbent pad·adjacent the said cover sheet comprising a loosely formed fibrous mass, and a separate second absorbent pad intermediate the said first pad and the said backing sheet, the said second pad comprising a mass of fibres, and being more dense than the said first pad throughout with the average interfibre spacings in the second pad being substantially less than the average interfibre spacings in the first pad, the said second pad rapidly transmitting body fluids to remote locations of the second pad for retention in the said locations at a location spaced from the cover sheet, the said second absorbent pad being compressed such that the ratio of the density of the second pad to the density of the first pad ranges from 1.5 : 1 to 7:1, the ratio of the first to second pad thicknesses being from 20:1 to 2:1, the said 3 first pad having a density of from 0.03 to 0.07 g/cm and the second 3 pad having a density of from 0.14 to 0.22 g/cm .
The disposable diaper preferably also includes a top wadding sheet covering a front surface of the first pad, and preferably also a back wadding sheet covering a back surface of the second pad. The said back wadding sheet preferably is compressed.
The combined thickness of the first and second pad preferably varies from 1 to 38 mn. The ratio of the density of the second pad to the density of the first pad preferably ranges from 2:1 to 4:1.
A feature of the present invention is that the compressed area of the second pad absorbs body fluids from the first pad and rapidly transmits the fluids to remote locations of the second pad.
Another feature of the present invention is that the dispersed fluids are retained in the compressed area of the second pad at a location spaced from the cover sheet.
Thus, an advantage of the present invention is that the pads minimize back wetting of the body fluids through the cover sheet and maintain the cover sheet in a relatively dry condition during use of the article.
Yet another advantage of the present invention is that the pads may be made in a simplified manner and at a reduced cost.
The invention may be put into practice in various ways and a number of specific embodiments will be described to illustrate the invention with reference to the accompanying drawings, in which:
Figure 1 is a fragmentary front plan view of an absorbent article of the present invention in the form of a disposable diaper;
Figure 2 1s a fragmentary sectional view taken along the line 2-2 of Figure 1;
Figure 3 is a perspective view of the article of-Figure 1 as folded into a box-pleat configuration;
Figure 4 is a top plan view partly broken away for clarity of another form of disposable diaper.
Referring now to Figures 1 and 2, there is shown a disposable absorbent 10 article generally designated 20 which is illustrated in the form of a disposable diaper. As shown, the article or diaper 20 has an absorbent pad assembly 21 having a fluid impervious backing sheet 22, such as polyethylene, defining a back surface 23 of the pad assembly, which covers the back surface 28 of the pad 26, a fluid pervious top or cover sheet 24, such as non-woven material, defining a substantial portion of a front surface 25 of the pad assembly, and an absorbent pad generally designated 26 intermediate the backing sheet 22 and the cover sheet 24. With reference to Figure 1, the diaper 20 may have a pair of tape fasteners 38 for securing the diaper about an infant during placement, and the backing sheet 22 may have lateral side margins 32 folded over and secured to the cover sheet 24 such that the margins 32 cover side portions of the pad 26.
As shown in Figures 1 and 2, the absorbent pad 26 has a first absorbent pad or layer 40 located adjacent the cover sheet 24 and second absorbent pad or layer 42 located intermediate the first pad 40 and the backing sheet 22. The pad 26 may have a top wadding sheet 34
510 61 covering a front surface 30 of the upper first pad 40 and back wadding sheet 36 covering a back surface 28 of the lower second pad 42. In one form, as shown, a back surface 41 of the. first pad 40 may be placed against a front surface 43 of the second pad 42, or, in an alter5 native form, a fluid pervious sheet, such as a wadding sheet, may be interposed between the first and second pads 40 and 42, respectively.
The first pad 40 is made from a loosely formed mass of fibres, such as comminuted wood pulp referred to in the art as fluff. Although the first pad may be compacted, if desired, the first pad 40 may have minimal compression in order to obtain a soft, fluffy front pad 40 with relatively large interfibre spacings.
3
The density of the top pad 40 is between 0.03 g/cm and 0.07 g/cm , q 3 preferably between about 0.04 g/cnr and about 0.07 g/cm and more 3 3 preferably between about 0.06 g/cm and about 0.07 g/cm . The second 15 lower pad 42 is also made from a mass of fibres, such as comminuted wood pulp, similar to pad 40 but this pad is prepared as by compression or any other suitable conventional means, to a density orfi between
3 3
0.14 g/cm and 0.22 g/cm , preferably from about 0.16 g/cm and
3 3
0.20 g/cm , and more preferably from about 0.18 g/cm and 0.20 g/cm .
Within the afore-described parameters of densities, it is also the case that the ratio of the density of the lower pad 42 to that of the top pad 40 be from 1.5:1 to 7:1, preferably about 2:1 to about 5:1 and more preferably from about 2:1 to 4:1. The densities are, of course, simply determined from a given weight of a measured volume (length x width x thickness with the latter measured as described below).
The thicknesses of the pads may vary widely but, in general, they are combined to give an overall thickness of about 40 mils, to
1500 mils (about 1 mm to about 40 mm) with ratios of thicknesses of top to bottom pad ranging from 20:1 to 2:1, and more preferably 10:1 to
4:1. All thicknesses are based upon measurements with a load of o
4.1 g/cm on the pad since without such an applied load the loftiness and resiliency of the fluff pad would give varying values. Density parameters are then based on such thickness determinations.
For infant diapers total pad thickness will, obviously, generally 10 be lower than for diapers. Typical newborn infant diapers may have total pad thickness of about 1 mm to about 6 mm or about 2 mm to about 10 mm depending on the diaper style. For larger babies, pad thickness totals may range from about 2 mm to about 8 mm or about 3 mm to about 12 mm.
Further, it may be desirable to point out that total pad fluff weights 15 will, of course, vary considerably as to thicknesses and sizes of the pads.
As a guide, such weight may vary from about 10 to 20 grams up to about 100 grams. Again, generally, the ratio of the weights of the top to bottom pads may vary from about 2:1 to 1:2 but preferably will be about the same, particularly as this permits the greatest facility in manufacture. Thus, for example, a single web of fluff can be formed in any of the conventional ways, then split and the one for the bottom layer compressed as desired in accordance with the present invention.
In use, the diaper 20 is secured about an infant by the tape fasteners 38. During voiding, urine passes through the cover sheet 24 into a localized portion of the first pad 40, and due to the relatively small
Interfibre spacings in the compressed second pad 42, the fluids are rapidly absorbed from the first pad 40 by the second pad 42. Also, the compressed pad 42 transmits the fluids to pad portions which are remote from the point at which the urine was applied to the diaper. Although a relatively large amount of fluff material has been compressed in producing the pad 42 and thus it has a smaller fluid holding capacity than the pad 40 due to the relative size of their interfibre spacings, the rapid spreading of the fluid throughout pad 42 permits the overall pad composite 26 to retain substantially as much fluid as an equivalent weight uncompressed pad assembly much like reservoirs which retain the body fluids in localities but due to the more rapid and efficient spreading of the urine there is much less leakage after each .urination and also a marked reduction in back wetting thereby maintaining the top sheet 24 in a relatively dry condition. In this manner, the first and second pads 40 and 42, respectively, cooperate to rapidly disperse fluids throughout the second pad 42 while making maximum use of the pad material and maintaining the top sheet 24 in a relatively dry state.
As perviously indicated, the first pad 40 is relatively soft· and conformable since it is relatively uncompressed. Accordingly, the first and second pads 40 and 42 respectively, provide a pad structure for the diaper which is soft and conformable to the shape of the wearer in order to maximise comfort and provide an excellent fit of the diaper. In addition, the pad 26 of the present invention may be made in a simplified manner by compressing the second pad 42 and by then placing the first pad 40 against the second pad 42 during manufacture of. the diaper. Thus, the diaper is made without the necessity of wetting and drying the compressed regions which would otherwise add to the complexity and cost of manufacture.
Referring to Figure 3, the pad assembly 21 of Figure 1 may be folded along a plurality of longitudinally extending fold lines to define a box-pleat configuration of the diaper. Thus, the diaper is folded along a pair of first fold lines 50 to define a longitudinally extending central panel 52 and along a pair of second fold lines 54 to define a pair of longitudinally extending first panels 56 intermediate the fold lines 50 and 54 and a pair of outermost panels 58 extending from the second fold lines 54.
Referring to Figure 4, the diaper 60 is of an hour-glass configuration having a crotch area 62 and four portions of greater width defining ears 64, 66, 68 and 70. The diaper includes a backing sheet.72, e.g. of polyethylene, and a top sheet 74, similarly as in the boxpleated diaper. An absorbent pad assembly 75 similar to pads 26, 40 and 42 of the box-pleated diaper is disposed between the top and backsheets.
Waddings 77 similar to 34 and 36 of the box-pleated diaper may be provided similarly as in the box-pleated diaper. The pad assembly including wadding sheets are of lesser dimensions, as indicated than the top and backsheets which are of similar dimensions.
In a product blind test of 106 users comprising a first standard pad diaper (pad of 36 grams wood fluff of uniform density of 0.1 g/cc - pad size 300 mm x 409 mm) with a second 2-layer pad diaper in accordance with the present invention of similar dimensions and weight as the first diaper but wherein the top pad of the second diaper has a density of 0.06 g/cc and the bottom pad a density of 0.2 g/cc, it was found as follows:
510 61
prefer double fluff Layer prefer std. no preference ratio B B B - overall preference 41 21 38 +1.49+ - drier bottom 35 20 45 +1.36 -strength 34 9 57 +1.65+ - absorption 37 21 42 +1.38 - overall fit +1.02 - fit at thighs -1.08 - thickness 33 15 52 +1.44
leakage occurrence 33 40 diaper could absorb if needed.
The overall preference ratio of +1.49 is statistically equivalent to a +2 sigma preference for the 2-layer pad diaper and indicates at a 95% confidence level that a majority would prefer the 2-layer pad diaper to the conventional single pad diaper.
Claims (8)
1. A disposable diaper in a longitudinally oriented box-pleated configuration, or a generally hour-glass or waisted shape comprising, a backing sheet of fluid impervious material, a fluid pervious cover
2. An article as claimed in Claim 1 in which the combined thickness 20 of the first and second pad varies from 1 to 38 mm.
3. A disposable diaper as claimed in Claim 2 in which the ratio of the densities is from 2:1 to 4 : 1.
4. A disposable diaper as claimed in any one of Claims 1 to 3 including a top wadding sheet covering a front surface of the first pad. 25 5. A disposable diaper as claimed in any one of Claims 1 to 4 including a back wadding sheet covering a back surface of the second pad. 5106 1
5. Described herein with reference to Figures 1, 2 and 3 of the accompanying drawings. 5 sheet, a first absorbent pad adjacent the said cover sheet comprising a loosely formed fibrous mass, and a separate second.absorbent pad intermediate the said first pad and the said backing sheet, the said second pad comprising a mass of fibres, and being more dense than the said first pad throughout with the average interfibre spacings in the second 10 pad being substantially less than the average interfibre spacings in the first pad, the said second pad rapidly transmitting body fluids to remote locations of the second pad for retention in the said locations at a location spaced from the cover sheet, the said second absorbent pad being compressed such that the ratio of the density of the second pad 15 to the density of the first pad ranges from 1.5 :1 to 7: 1, the ratio of the first to second pad thicknesses being from 20:1 to 2:1, the said first pad having a density of from 0.03 to 0.07 g/cm 3 and the second pad having a density of from 0.14 to 0.22 g/cm ·
6. A disposable diaper as claimed in Claim 5 in which the said back wadding sheet is compressed.
7. A disposable diaper as claimed in Claim 1 in a longitudinally oriented box-pleated configuration, or substantially as specifically
8. A disposable diaper as claimed in Claim 1 of a generally hour-glass or waisted shape substantially as specifically described herein with reference to Figure 4 of the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US9938579A | 1979-12-03 | 1979-12-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
IE802505L IE802505L (en) | 1981-06-03 |
IE51061B1 true IE51061B1 (en) | 1986-09-17 |
Family
ID=22274766
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IE2505/80A IE51061B1 (en) | 1979-12-03 | 1980-12-02 | Disposable diapers |
Country Status (20)
Country | Link |
---|---|
JP (1) | JPS5685401A (en) |
AR (1) | AR240232A1 (en) |
AU (1) | AU536507B2 (en) |
BE (1) | BE886404A (en) |
BR (1) | BR8007598A (en) |
CA (1) | CA1153541A (en) |
CH (1) | CH651185A5 (en) |
DE (1) | DE3044449A1 (en) |
DK (1) | DK154045C (en) |
ES (1) | ES264633Y (en) |
FR (1) | FR2470590B1 (en) |
GB (1) | GB2063683B (en) |
GR (1) | GR72829B (en) |
IE (1) | IE51061B1 (en) |
IT (1) | IT1128632B (en) |
MX (1) | MX153968A (en) |
NL (1) | NL8006293A (en) |
PH (1) | PH17624A (en) |
PT (1) | PT72110B (en) |
ZA (1) | ZA806694B (en) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA818029B (en) * | 1980-12-01 | 1982-10-27 | Kimberly Clark Co | Sanitary napkin with two layers of absorbent |
US4461621A (en) * | 1981-10-19 | 1984-07-24 | Colgate-Palmolive Company | Disposable diaper with polymer coating |
US4496358A (en) * | 1982-12-13 | 1985-01-29 | Colgate-Palmolive Company | Diaper having variable density absorbent pad |
GR79970B (en) * | 1983-08-15 | 1984-10-31 | Personal Products Co | |
FR2554390B1 (en) * | 1983-11-08 | 1986-07-18 | Beghin Say Sa | DISPOSABLE LIQUID ABSORBENT ARTICLE |
JPS60215804A (en) * | 1984-04-04 | 1985-10-29 | 花王株式会社 | Absorbable article |
ZA852358B (en) * | 1984-04-13 | 1986-02-26 | Kimberly Clark Co | Absorbent structure designed for absorbing body fluids |
CA1260202A (en) * | 1984-04-13 | 1989-09-26 | Leo J. Bernardin | Absorbent structure designed for absorbing body fluids |
US5176668A (en) | 1984-04-13 | 1993-01-05 | Kimberly-Clark Corporation | Absorbent structure designed for absorbing body fluids |
PH23956A (en) * | 1985-05-15 | 1990-01-23 | Procter & Gamble | Absorbent articles with dual layered cores |
DE3620077A1 (en) * | 1986-06-14 | 1987-12-17 | Pelz & Co Kg W | Absorbent body as panty liner or sanitary towel |
US4935022A (en) * | 1988-02-11 | 1990-06-19 | The Procter & Gamble Company | Thin absorbent articles containing gelling agent |
US5797894A (en) * | 1988-09-12 | 1998-08-25 | Johnson & Johnson, Inc. | Unitized sanitary napkin |
AU4114189A (en) * | 1988-09-12 | 1990-03-15 | Johnson & Johnson Inc. | Unitized sanitary napkin |
MY104331A (en) * | 1988-09-12 | 1994-03-31 | Johnson & Johnson Inc | Unitized sanitary napkin |
CA2014203C (en) | 1989-05-08 | 2000-03-21 | Margaret Gwyn Latimer | Absorbent structure having improved fluid surge management and product incorporating same |
US4994037A (en) | 1990-07-09 | 1991-02-19 | Kimberly-Clark Corporation | Absorbent structure designed for absorbing body fluids |
US5037409A (en) | 1990-07-12 | 1991-08-06 | Kimberly-Clark Corporation | Absorbent article having a hydrophilic flow-modulating layer |
ZA92308B (en) | 1991-09-11 | 1992-10-28 | Kimberly Clark Co | Thin absorbent article having rapid uptake of liquid |
JP2582716B2 (en) * | 1993-03-31 | 1997-02-19 | 株式会社クレシア | Disposable diapers with excellent absorbency |
RU2311160C2 (en) * | 2001-12-19 | 2007-11-27 | Кимберли-Кларк Ворлдвайд, Инк | Thin flexible absorbing article having low absorbency and protected from leakage |
US7615040B2 (en) | 2001-12-19 | 2009-11-10 | Kimberly-Clark Worldwide, Inc. | Thin, flexible, low capacity absorbent article with leakage protection |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB937019A (en) * | 1958-01-22 | 1963-09-18 | Robinson & Sons Ltd | Improvements in or relating to absorbent pads, disposable napkins and like articles |
US3612056A (en) * | 1969-09-29 | 1971-10-12 | Personal Products Co | Sanitary napkin |
US3612055A (en) * | 1969-09-29 | 1971-10-12 | Johnson & Johnson | Disposable diaper or the like and method of manufacture |
US3731686A (en) * | 1971-03-22 | 1973-05-08 | Personal Products Co | Fluid absorption and retention products and methods of making the same |
US3763863A (en) * | 1971-10-07 | 1973-10-09 | Johnson & Johnson | Disposable diaper |
ZA773902B (en) * | 1976-08-09 | 1979-02-28 | Colgate Palmolive Co | Absorbent article with improved pad |
GB2017505B (en) * | 1978-03-27 | 1983-02-02 | Colgate Palmolive Co | Disposable absorbent product |
-
1980
- 1980-10-10 FR FR8021665A patent/FR2470590B1/en not_active Expired
- 1980-10-30 ZA ZA00806694A patent/ZA806694B/en unknown
- 1980-11-04 GR GR63278A patent/GR72829B/el unknown
- 1980-11-10 DK DK477680A patent/DK154045C/en not_active IP Right Cessation
- 1980-11-18 NL NL8006293A patent/NL8006293A/en not_active Application Discontinuation
- 1980-11-20 BR BR8007598A patent/BR8007598A/en unknown
- 1980-11-24 IT IT50223/80A patent/IT1128632B/en active
- 1980-11-25 AU AU64665/80A patent/AU536507B2/en not_active Ceased
- 1980-11-26 DE DE19803044449 patent/DE3044449A1/en not_active Ceased
- 1980-11-26 PT PT72110A patent/PT72110B/en not_active IP Right Cessation
- 1980-11-26 JP JP16650680A patent/JPS5685401A/en active Granted
- 1980-11-28 BE BE0/202975A patent/BE886404A/en not_active IP Right Cessation
- 1980-12-01 ES ES1980264633U patent/ES264633Y/en not_active Expired
- 1980-12-01 MX MX184985A patent/MX153968A/en unknown
- 1980-12-02 CA CA000365982A patent/CA1153541A/en not_active Expired
- 1980-12-02 AR AR283447A patent/AR240232A1/en active
- 1980-12-02 GB GB8038560A patent/GB2063683B/en not_active Expired
- 1980-12-02 PH PH24932A patent/PH17624A/en unknown
- 1980-12-02 IE IE2505/80A patent/IE51061B1/en not_active IP Right Cessation
- 1980-12-03 CH CH8943/80A patent/CH651185A5/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK477680A (en) | 1981-06-04 |
FR2470590B1 (en) | 1986-08-01 |
JPH0451181B2 (en) | 1992-08-18 |
CH651185A5 (en) | 1985-09-13 |
BE886404A (en) | 1981-03-16 |
DK154045B (en) | 1988-10-10 |
BR8007598A (en) | 1981-06-09 |
FR2470590A1 (en) | 1981-06-12 |
DE3044449A1 (en) | 1981-08-20 |
NL8006293A (en) | 1981-07-01 |
MX153968A (en) | 1987-03-03 |
IE802505L (en) | 1981-06-03 |
DK154045C (en) | 1989-03-06 |
GB2063683B (en) | 1984-06-13 |
ZA806694B (en) | 1982-05-26 |
JPS5685401A (en) | 1981-07-11 |
AR240232A1 (en) | 1990-03-30 |
GR72829B (en) | 1983-12-06 |
PT72110B (en) | 1981-10-22 |
AU536507B2 (en) | 1984-05-10 |
IT8050223A0 (en) | 1980-11-24 |
GB2063683A (en) | 1981-06-10 |
PT72110A (en) | 1980-12-01 |
ES264633U (en) | 1982-12-16 |
AU6466580A (en) | 1981-06-11 |
CA1153541A (en) | 1983-09-13 |
IT1128632B (en) | 1986-05-28 |
ES264633Y (en) | 1983-06-16 |
PH17624A (en) | 1984-10-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4461621A (en) | Disposable diaper with polymer coating | |
IE51061B1 (en) | Disposable diapers | |
CA1105689A (en) | Absorbent article with improved pad | |
EP0222585B1 (en) | An absorbent article having liquid impervious shelves | |
US4213459A (en) | Disposable diaper with localized area of increased density | |
US5545156A (en) | Absorbent article having a preformed member | |
EP0223487B1 (en) | An absorbent article having moisture insensitive, resilient shaping members | |
CA2233365C (en) | Absorbent article with coiled side walls | |
EP0223486B1 (en) | An absorbent article having an expanding overwrap | |
US4226237A (en) | Layered absorbent structure | |
US3494362A (en) | Absorbent pad | |
US5053029A (en) | Absorbent peat moss board product | |
US2952259A (en) | Absorbent product | |
US20030225383A1 (en) | Multiple layer absorbent article | |
EP1060722B1 (en) | A unitized cover and absorbent transfer layer | |
GB2170108A (en) | Absorbent article such as a diaper, an incontinence protector or a sanitary napkin | |
WO1998017219A1 (en) | Absorbent article with retaining structure for receiving and retaining fecal material | |
GB2124907A (en) | Absorbent device for bodily liquids | |
GB2181955A (en) | Sanitary napkin | |
US5675079A (en) | Apparatus for measuring the crush recovery of an absorbent article | |
US20020087133A1 (en) | Absorbent article with improved leakage safety | |
EP1048278A2 (en) | Absorbent structure having differential density | |
US6791005B2 (en) | Absorbent articles with improved leakage safety | |
CA1152701A (en) | Gatherable, contoured, disposable diaper | |
JPH0553627U (en) | Absorbent article |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed |