WO1991011978A1 - An absorbent body incorporating two layers which contain different superabsorbents - Google Patents

An absorbent body incorporating two layers which contain different superabsorbents Download PDF

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Publication number
WO1991011978A1
WO1991011978A1 PCT/SE1991/000101 SE9100101W WO9111978A1 WO 1991011978 A1 WO1991011978 A1 WO 1991011978A1 SE 9100101 W SE9100101 W SE 9100101W WO 9111978 A1 WO9111978 A1 WO 9111978A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluff
superabsorbent
layer
absorbent body
liquid
Prior art date
Application number
PCT/SE1991/000101
Other languages
French (fr)
Inventor
Lars Gustafsson
Stefan Areskoug
Magnus Qvist
Original Assignee
Mölnlycke AB
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=20378563&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1991011978(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Mölnlycke AB filed Critical Mölnlycke AB
Priority to CA002075963A priority Critical patent/CA2075963C/en
Priority to EP91904290A priority patent/EP0592401B1/en
Priority to AU72514/91A priority patent/AU644628B2/en
Priority to DE69112430T priority patent/DE69112430T2/en
Publication of WO1991011978A1 publication Critical patent/WO1991011978A1/en
Priority to FI923616A priority patent/FI101766B1/en
Priority to NO923172A priority patent/NO178603C/en
Priority to GR950402416T priority patent/GR3017292T3/en

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
    • A61F13/53—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
    • A61F2013/530007—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 from 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
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530489—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being randomly mixed in with other material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/53051—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged
    • A61F2013/530547—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
    • A61F2013/530554—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers and being fixed to a web
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530481—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials
    • A61F2013/530708—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties
    • A61F2013/530737—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the absorbent capacity
    • A61F2013/530766—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials characterized by the absorbency properties by the absorbent capacity by the cross-link factor

Definitions

  • the present invention relates to an absorbent body or pad for use in diapers, incontinence guards or like articles.
  • the absorbent pad of a diaper has a high absorption rate.
  • the absorbent pad will normally exhibit a high absorption rate when dry, since the pulp core will then enclose a sufficient quantity of air which can be displaced rapidly and replaced with urine.
  • the fibres of the fluff mat in a dry absorbent pad are relatively rigid and are therewith able to withstand a certain amount of weight before becoming compressed.
  • the fibres lose much of their ability to withstand weight or pressure when the pad is wet, therewith causing the fluff mat to collapse.
  • superabsorbents are able to absorb large quantities of urine, about 3-5 times the absorbency of fluff. Although this ability can be utilized, it is not particularly effective when solely one absorption ability is exchanged for the other. Super ⁇ absorbents can also contribute to other properties, such as improved surface dryness, etc. , for instance.
  • the present invention provides a solution to this problem.
  • the inventive absorbent pad is characterized in that the pad includes a first layer of fluff which, when the article is in use, lies nearest the wearer, a first super absorbent which is disposed in said fluff layer and which has a high degree of cross-linking and therewith the ability to swell while being substantially un ⁇ affected by normally occurring pressures, whereby subsequent to liquid absorption the collapsed pulp is loosened and again forms an air-containing voluminous fluff layer, and in that the absorbent pad includes a second layer in which there is disposed a second super- absorbent whose liquid absorbing capacity is greater than that of the first superabsorbent.
  • a highly cross-linked superabsorbent shall improve the rate at which a subse ⁇ quent liquid discharge is absorbed, by loosening or "fluffing" the collapsed fluff mat and increasing the total volume of the wet region.
  • a superabsorbent which is so highly cross-linked that it can swell while being substantially unaffected by normally occurring pressures has a lower absorbency than a superabsorbent which has a lower degree of cross-linking. Consequently, the inventive absorbent pad includes a second layer which incorporates a second superabsorbent having a higher liquid absorbing capacity.
  • Figures 1 and 2 illustrate schematically the state of a cross- linked superabsorbent contained in a fluff mat, both before and after liquid absorption
  • Figures 3 and 4 illustrate the corresponding states of a fluff mat containing a highly cross-linked superabsorbent.
  • Figure 1 illustrates a fluff layer 1 in which grains or particles of cross-linked superabsorbent 2 are mixed.
  • the fluff mat illustrated in Figure 1 is in a dry, voluminous state with an abundancy of air between the fibres.
  • the absorbent pad shown in Figure 1 can there ⁇ fore rapidly absorb liquid penetrating into the pad. When the fluff mat becomes wet, it collapses under the weight of absorbed liquid and under the pressure exerted by external loads and if no superabsorbents were present the collapsed fluff mat would discharge liquid when the absorbent pad is subjected to further, external pressures.
  • the superabsorbents present in the fluff mat 1 take liquid from the fluff by suction and increase in size, by swelling.
  • the superabsorbents 2 are cross-linked to an extent such as to possess suffi ⁇ cient gel strength to retain absorbed liquid under normal pressure in use, i.e. normal pressures on the absorbent pad of a diaper. As illustrated in Figure 2, the superabsorbents 2 do not form a continuous gel, but remain in the form of mutually separate grains or particles, even in their swollen state. As before- mentioned, the superabsorbents are also able to retain liquid when subjected to normal pressures in use, but do not retain their shape and are liable to be flat ⁇ tened laterally when subjected to pressure. The super ⁇ absorbents 2 are therefore not able to loosen the fluff, and the fluff mat will therefore remain sub- stantially in a collapsed state. The absorbent pad shown in Figure 2 is therefore not able to quickly absorb further liquid.
  • FIG. 3 illustrates a fluff mat 1 in which there are mixed superabsorbents 3 which have a high degree of cross-linking and therewith a high gel strength.
  • the fluff mat 1 shown in Figure 3 will collapse in the same way as that described with reference, to Figure 1 when the mat absorbs liquid.
  • the superabsorbents 3, however, are so highly cross-linked and of such a high gel strength that they are able to swell under normal use pressure in a diaper or the like, without changing shape.
  • the fluff mat 1 when the superabsorbent particles 3 swell, the fluff mat 1 will be loosened or "fluffed", as illustrated in Figure 4.
  • the fluff mat is emptied of liquid, at the same time as it is loosened by the superabsorbent.
  • the absorbent pad illustrated in Figure 4 will contain a large amount of air which can be readily displaced when further liquid is absorbed.
  • An inventive absorbent pad is constructed from an upper layer of the kind described with reference to Figures 3 and 4, this layer laying nearest the user when the absorbent pad is used in a diaper, and a bottom layer which includes a superabsorbent whose liquid absorbency is greater than the absorbency of the upper layer.
  • the bottom layer of the inventive absorbent pad may, for instance, be constructed in the manner described with reference to Figures 1 and 2.
  • the superabsorbent in the bottom layer may optionally comprise a superabsorbent having a gel strength which is so low as to form a continuous gel.
  • the important criterion in this respect is that the upper layer is able to repeatedly absorb liquid quickly.
  • a gel which exhibits a very high gel strength and which functions effectively in the upper layer of the inventive absorbent pad is Salsorb DPX 5038.
  • an inventive absorbent pad may comprise an integrally configured fluff body which incorporates different layers of different superabsorbents.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Photoreceptors In Electrophotography (AREA)

Abstract

The invention relates to an absorbent body for use in diapers or like articles. The invention is characterized in that the absorbent body includes a first layer of fluff, a first superabsorbent mixed in the fluff layer and having a high degree of cross-linking, and in that the absorbent body includes a second layer which contains a second superabsorbent having a higher liquid absorbency than the first superabsorbent.

Description

An absorbent body incorporating two layers which contain different superabsorbents
The present invention relates to an absorbent body or pad for use in diapers, incontinence guards or like articles.
It is highly essential that the absorbent pad of a diaper has a high absorption rate. The absorbent pad will normally exhibit a high absorption rate when dry, since the pulp core will then enclose a sufficient quantity of air which can be displaced rapidly and replaced with urine.
The fibres of the fluff mat in a dry absorbent pad are relatively rigid and are therewith able to withstand a certain amount of weight before becoming compressed. The fibres lose much of their ability to withstand weight or pressure when the pad is wet, therewith causing the fluff mat to collapse.
A large part of the pad volume is lost when the fluff mat has collapsed. The ability of the fluff mat to further absorb liquid is then restricted to the ability of the fluff to transport the urine from one location to another. The majority of fluffs manage this with differing degrees of success, although the process of transportation is very slow within the fluff mat and is constantly con¬ cerned with the transportation of excess urine. This excess is the difference between the amount of liquid present in the fluff at a particular moment and the ability of the fluff to retain liquid.
As mentioned, superabsorbents are able to absorb large quantities of urine, about 3-5 times the absorbency of fluff. Although this ability can be utilized, it is not particularly effective when solely one absorption ability is exchanged for the other. Super¬ absorbents can also contribute to other properties, such as improved surface dryness, etc. , for instance.
The greatest obstacle to rapid, secondary absorption in a fluff mat which has collapsed at the first absorp¬ tion, is that there is no air in the wet fluff to dis- place.
The present invention provides a solution to this problem.
The inventive absorbent pad is characterized in that the pad includes a first layer of fluff which, when the article is in use, lies nearest the wearer, a first super absorbent which is disposed in said fluff layer and which has a high degree of cross-linking and therewith the ability to swell while being substantially un¬ affected by normally occurring pressures, whereby subsequent to liquid absorption the collapsed pulp is loosened and again forms an air-containing voluminous fluff layer, and in that the absorbent pad includes a second layer in which there is disposed a second super- absorbent whose liquid absorbing capacity is greater than that of the first superabsorbent.
We have found that a superabsorbent having a very high degree of cross-linking, with subsequent high gel strength, is able to loosen the wet fluff while empty¬ ing the fluff of liquid at the same time. It will be understood that the total absorbency of the absorbent pad is not solely dependent on how much liquid the fluff and the superabsorbent can absorb individually. The total absorbency is greatly dependent on the size of the volume that can be retained under the pressure forces that occur.
According to the invention, a highly cross-linked superabsorbent shall improve the rate at which a subse¬ quent liquid discharge is absorbed, by loosening or "fluffing" the collapsed fluff mat and increasing the total volume of the wet region.
A superabsorbent which is so highly cross-linked that it can swell while being substantially unaffected by normally occurring pressures has a lower absorbency than a superabsorbent which has a lower degree of cross-linking. Consequently, the inventive absorbent pad includes a second layer which incorporates a second superabsorbent having a higher liquid absorbing capacity.
The invention will now be described in more detail with reference to the accompanying drawing, in which Figures 1 and 2 illustrate schematically the state of a cross- linked superabsorbent contained in a fluff mat, both before and after liquid absorption, whereas Figures 3 and 4 illustrate the corresponding states of a fluff mat containing a highly cross-linked superabsorbent.
Figure 1 illustrates a fluff layer 1 in which grains or particles of cross-linked superabsorbent 2 are mixed. The fluff mat illustrated in Figure 1 is in a dry, voluminous state with an abundancy of air between the fibres. The absorbent pad shown in Figure 1 can there¬ fore rapidly absorb liquid penetrating into the pad. When the fluff mat becomes wet, it collapses under the weight of absorbed liquid and under the pressure exerted by external loads and if no superabsorbents were present the collapsed fluff mat would discharge liquid when the absorbent pad is subjected to further, external pressures. The superabsorbents present in the fluff mat 1 take liquid from the fluff by suction and increase in size, by swelling. The superabsorbents 2 are cross-linked to an extent such as to possess suffi¬ cient gel strength to retain absorbed liquid under normal pressure in use, i.e. normal pressures on the absorbent pad of a diaper. As illustrated in Figure 2, the superabsorbents 2 do not form a continuous gel, but remain in the form of mutually separate grains or particles, even in their swollen state. As before- mentioned, the superabsorbents are also able to retain liquid when subjected to normal pressures in use, but do not retain their shape and are liable to be flat¬ tened laterally when subjected to pressure. The super¬ absorbents 2 are therefore not able to loosen the fluff, and the fluff mat will therefore remain sub- stantially in a collapsed state. The absorbent pad shown in Figure 2 is therefore not able to quickly absorb further liquid.
Diaper manufacturers now desire superabsorbents whose gel strength will enable absorbed liquid to be retained effectively in the swollen gel even when subjected to pressure. The liquid absorbency of a superabsorbent decreases, however, with increased degrees of cross- linking and therewith increased gel strength.
We have found that there is at present no superabsor¬ bent which has a sufficiently high liquid absorbency while being capable, at the same time, of loosening up a collapsed fluff mat. Figure 3 illustrates a fluff mat 1 in which there are mixed superabsorbents 3 which have a high degree of cross-linking and therewith a high gel strength. As will be understood, the fluff mat 1 shown in Figure 3 will collapse in the same way as that described with reference, to Figure 1 when the mat absorbs liquid. The superabsorbents 3, however, are so highly cross-linked and of such a high gel strength that they are able to swell under normal use pressure in a diaper or the like, without changing shape. Consequently, when the superabsorbent particles 3 swell, the fluff mat 1 will be loosened or "fluffed", as illustrated in Figure 4. The fluff mat is emptied of liquid, at the same time as it is loosened by the superabsorbent. Subsequent to swelling of the superabsorbent and loosening of the fluff mat, the absorbent pad illustrated in Figure 4 will contain a large amount of air which can be readily displaced when further liquid is absorbed.
An inventive absorbent pad is constructed from an upper layer of the kind described with reference to Figures 3 and 4, this layer laying nearest the user when the absorbent pad is used in a diaper, and a bottom layer which includes a superabsorbent whose liquid absorbency is greater than the absorbency of the upper layer.
The bottom layer of the inventive absorbent pad may, for instance, be constructed in the manner described with reference to Figures 1 and 2.
The superabsorbent in the bottom layer may optionally comprise a superabsorbent having a gel strength which is so low as to form a continuous gel. The important criterion in this respect is that the upper layer is able to repeatedly absorb liquid quickly. One example of a gel which exhibits a very high gel strength and which functions effectively in the upper layer of the inventive absorbent pad is Salsorb DPX 5038.
Good results have been achieved with Aqualic CA W-2 in an upper fluff layer and while using the similarly cross-linked superabsorbent Aqualic CA W-4 in the bottom layer. According to the manufacturer, Aqualic CA W-2 has a higher degree of cross-linking and therewith greater gel strength than Aqualic CA W-4.
All of the superabsorbents mentioned by way of example are cross-linked sodium polyacrylates.
It will understood that the invention is not limited to the aforedescribed embodiment and that several modifi¬ cations can be made within the scope of the following claims.
For instance, an inventive absorbent pad may comprise an integrally configured fluff body which incorporates different layers of different superabsorbents.

Claims

1. An absorbent body for use in diapers, incontinence guards or like articles, c h a r a c t e r i z e d in that the absorbent body includes a first layer of fluff (1) which lies nearest the wearer's body in use, a first superabsorbent (3) which is mixed in said layer and which has a high degree of cross-linking and there- with the ability to swell without being affected sub¬ stantially by normally occurring pressure forces, whereby the fluff which collapses when absorbing liquid will be loosened and therewith again form an air-con¬ taining, voluminous fluff layer, and in that the absor- bent body includes a second layer containing a second superabsorbent (2) having a higher liquid absorbency than the first superabsorbent.
2. An absorbent body according to Claim 1, c h a r a c t e r i z e d in that the second layer comprises fluff in which the second superabsorbent (2) is mixed.
3. An absorbent body according to Claim 1 or 2, c h a r a c t e r i z e d in that the second superab¬ sorbent (2) in said second layer is cross-linked but has a lower gel strength than the first superabsorbent
(1).
PCT/SE1991/000101 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents WO1991011978A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CA002075963A CA2075963C (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different super-absorbents
EP91904290A EP0592401B1 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents
AU72514/91A AU644628B2 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents
DE69112430T DE69112430T2 (en) 1990-02-14 1991-02-13 ABSORPTION OBJECT WITH TWO DIFFERENT LAYERS CONTAINING SUPERABSORBANCES.
FI923616A FI101766B1 (en) 1990-02-14 1992-08-12 Absorption body for use in diapers, incontinence protectors or the like
NO923172A NO178603C (en) 1990-02-14 1992-08-13 Absorbent body comprising two layers containing different superabsorbents
GR950402416T GR3017292T3 (en) 1990-02-14 1995-09-05 An absorbent body incorporating two layers which contain different superabsorbents.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000534A SE465553C (en) 1990-02-14 1990-02-14 Absorbent body, comprising two layers containing different superabsorbents
SE9000534-9 1990-02-14

Publications (1)

Publication Number Publication Date
WO1991011978A1 true WO1991011978A1 (en) 1991-08-22

Family

ID=20378563

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000101 WO1991011978A1 (en) 1990-02-14 1991-02-13 An absorbent body incorporating two layers which contain different superabsorbents

Country Status (17)

Country Link
EP (1) EP0592401B1 (en)
JP (1) JP3018008B2 (en)
AT (1) ATE126690T1 (en)
AU (1) AU644628B2 (en)
CA (1) CA2075963C (en)
DE (1) DE69112430T2 (en)
DK (1) DK0592401T3 (en)
ES (1) ES2076523T3 (en)
FI (1) FI101766B1 (en)
GR (1) GR3017292T3 (en)
HU (1) HU212298B (en)
MX (1) MX173712B (en)
NO (1) NO178603C (en)
NZ (1) NZ236961A (en)
SE (1) SE465553C (en)
WO (1) WO1991011978A1 (en)
ZA (1) ZA91784B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5348547A (en) * 1993-04-05 1994-09-20 The Procter & Gamble Company Absorbent members having improved fluid distribution via low density and basis weight acquisition zones
EP0631768A1 (en) * 1993-06-30 1995-01-04 The Procter & Gamble Company Absorbent core having improved fluid handling properties
EP0640330A1 (en) * 1993-06-30 1995-03-01 The Procter & Gamble Company Hygienic absorbent articles
US5741241A (en) * 1992-04-28 1998-04-21 Sca Molnlycke Ab Absorbent body for an absorbent article
US6278037B1 (en) * 1997-03-27 2001-08-21 The Procter & Gamble Company Absorbent article having improved comfort during use by improved fit even when loaded and improved rewet performance
US6436433B1 (en) * 1997-02-21 2002-08-20 Lts Lohmann Therapie-Systeme Ag Transdermal or topical plaster system with a polyacrylate matrix with improved physical properties
WO2003080136A1 (en) * 2002-03-27 2003-10-02 Sca Hygiene Products Ab Absorbent product
WO2005032443A1 (en) * 2003-10-06 2005-04-14 Sca Hygiene Products Ab Absorbent article comprising an absorbent structure
US7615040B2 (en) 2001-12-19 2009-11-10 Kimberly-Clark Worldwide, Inc. Thin, flexible, low capacity absorbent article with leakage protection

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463747B (en) * 1989-05-31 1991-01-21 Moelnlycke Ab ABSORBING ALSTER INCLUDING AATMINSTONE TWO DIFFERENT SUPER ABSORBENTS
US6383960B1 (en) 1997-10-08 2002-05-07 Kimberly-Clark Worldwide, Inc. Layered absorbent structure
US6710225B1 (en) 1998-06-15 2004-03-23 Kimberly-Clark Worldwide, Inc. Layered absorbent structure with a zoned basis weight
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GB2048078A (en) * 1979-04-28 1980-12-10 Zenmi Co Ltd Sanitary napkin
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Cited By (14)

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US5741241A (en) * 1992-04-28 1998-04-21 Sca Molnlycke Ab Absorbent body for an absorbent article
US5348547A (en) * 1993-04-05 1994-09-20 The Procter & Gamble Company Absorbent members having improved fluid distribution via low density and basis weight acquisition zones
EP0631768A1 (en) * 1993-06-30 1995-01-04 The Procter & Gamble Company Absorbent core having improved fluid handling properties
EP0640330A1 (en) * 1993-06-30 1995-03-01 The Procter & Gamble Company Hygienic absorbent articles
TR28301A (en) * 1993-06-30 1996-04-09 Procter & Gamble Absorbent bodies containing fibrous material and superabsorbent material, and absorbent articles containing these bodies.
US5762641A (en) * 1993-06-30 1998-06-09 The Procter & Gamble Company Absorbent core having improved fluid handling properties
US6436433B1 (en) * 1997-02-21 2002-08-20 Lts Lohmann Therapie-Systeme Ag Transdermal or topical plaster system with a polyacrylate matrix with improved physical properties
US6278037B1 (en) * 1997-03-27 2001-08-21 The Procter & Gamble Company Absorbent article having improved comfort during use by improved fit even when loaded and improved rewet performance
US7615040B2 (en) 2001-12-19 2009-11-10 Kimberly-Clark Worldwide, Inc. Thin, flexible, low capacity absorbent article with leakage protection
WO2003080136A1 (en) * 2002-03-27 2003-10-02 Sca Hygiene Products Ab Absorbent product
CN1296100C (en) * 2002-03-27 2007-01-24 Sca卫生产品股份公司 Absorbent product
AU2003216023B2 (en) * 2002-03-27 2009-02-05 Sca Hygiene Products Ab Absorbent product
WO2005032443A1 (en) * 2003-10-06 2005-04-14 Sca Hygiene Products Ab Absorbent article comprising an absorbent structure
CN100438842C (en) * 2003-10-06 2008-12-03 Sca卫生产品股份公司 Absorbent article comprising an absorbent structure

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DE69112430T2 (en) 1996-02-08
HUT66278A (en) 1994-11-28
MX173712B (en) 1994-03-23
AU7251491A (en) 1991-09-03
ZA91784B (en) 1991-11-27
SE9000534L (en) 1991-08-15
GR3017292T3 (en) 1995-12-31
DK0592401T3 (en) 1995-10-16
ATE126690T1 (en) 1995-09-15
FI923616A (en) 1992-08-12
SE9000534D0 (en) 1990-02-14
JP3018008B2 (en) 2000-03-13
CA2075963A1 (en) 1991-08-15
ES2076523T3 (en) 1995-11-01
CA2075963C (en) 2002-01-01
AU644628B2 (en) 1993-12-16
NO178603C (en) 1996-05-02
NZ236961A (en) 1992-12-23
SE465553C (en) 1996-06-24
JPH05504083A (en) 1993-07-01
NO923172D0 (en) 1992-08-13
HU212298B (en) 1996-05-28
SE465553B (en) 1991-09-30
HU9202647D0 (en) 1992-12-28
FI101766B (en) 1998-08-31
DE69112430D1 (en) 1995-09-28
NO923172L (en) 1992-10-13
EP0592401B1 (en) 1995-08-23
FI101766B1 (en) 1998-08-31
NO178603B (en) 1996-01-22
FI923616A0 (en) 1992-08-12
EP0592401A1 (en) 1994-04-20

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