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WO1991011164A1 - Matiere absorbante comportant un rembourrage en fibres - Google Patents

Matiere absorbante comportant un rembourrage en fibres Download PDF

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Publication number
WO1991011164A1
WO1991011164A1 PCT/SE1991/000074 SE9100074W WO9111164A1 WO 1991011164 A1 WO1991011164 A1 WO 1991011164A1 SE 9100074 W SE9100074 W SE 9100074W WO 9111164 A1 WO9111164 A1 WO 9111164A1
Authority
WO
WIPO (PCT)
Prior art keywords
fibres
wadding
absorbent body
body according
fibre
Prior art date
Application number
PCT/SE1991/000074
Other languages
English (en)
Inventor
Annika Ahnell
Berith Porsö
Berit Rosseland
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
Application filed by Mölnlycke AB filed Critical Mölnlycke AB
Publication of WO1991011164A1 publication Critical patent/WO1991011164A1/fr

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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
    • 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
    • A61F13/53743—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 characterised by the position of the layer relative to the other layers
    • A61F13/53747—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 characterised by the position of the layer relative to the other layers the layer is facing the topsheet
    • 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
    • A61F13/531—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 a homogeneous 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
    • A61F13/51—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 of the pads
    • 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
    • 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
    • A61F2013/530036—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 being made in chemically-modified cellulosic material, e.g. Rayon
    • 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
    • A61F2013/530343—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 being natural fibres
    • A61F2013/53035—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 being natural fibres of cotton
    • 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
    • A61F2013/530379—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 comprising mixtures of fibres
    • A61F2013/53043—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 comprising mixtures of fibres with different ratio of components
    • 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
    • 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
    • A61F2013/530583—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 form
    • 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
    • A61F2013/530583—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 form
    • A61F2013/530613—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 form in fibres
    • 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
    • A61F2013/53721—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 with capillary means

Definitions

  • the present invention relates to an absorbent body for use in disposable absorbent articles, such as diapers, incontinence guards, sanitary napkins, underwear pro ⁇ tectors or the like and including fibre wadding.
  • Absorbent articles of the aforesaid kind are normally constructed from absorbent,bodies which include hydro- filic fibres, such as cellulose fibres for instance.
  • fibre wadding which will function as an absorbent body, with or without the addition of another absorbent material, for instance superabsorbents.
  • superabsor- bents is meant substances which are capable of absorb ⁇ ing liguid in guantities many times their own weight.
  • the purpose of the fibre wadding is not to absorb liquid to any great extent, but instead to enable liquid to pass quickly through the wadding, or to be transported thereby to an underlying absorbent layer.
  • the wadding should not col ⁇ lapse when subjected to pressure, for instance when the user sits down, since liquid would then be able to penetrate up through the wadding and come into contact with the user, causing considerable discomfort. This is combined with considerable difficulties in obtaining a suitable wadding composition which will fulfil the above requirements, since these requirements require wadding properties which, to some extent, are directly opposed to one another.
  • Coarse heat-meltable fibres for instance fibres of polyester, polypropylene or polypropylene, provide a shape-stable resilient and springy fibre wadding.
  • Fibre wadding constr ⁇ cted from such fibres will lack a fine capillary system which is capable of con ⁇ ducting liquid in a desired direction, for instance to an absorbent layer adjoining the fibre wadding. Neither is such fibre wadding particularly soft and comfortable when worn immediately next to the skin.
  • fine hydrofilic fibres for instance viscose fibres or cellulose-based fibres
  • Such wadding will also collapse readily when wet.
  • the present invention provides a fibre wadding with which the aforesaid difficulties and drawbacks have been overcome.
  • An inventive absorbent body is mainly characterized in that the fibre wadding includes a mixture of coarse fibres having a size of at least 17 dtex and fine fibres having a size of at most 2 dtex.
  • a particularly suitable fibre mixture is one which comprises 85% by weight coarse fibres and 15% by weight fine fibres.
  • the presence of coarse fibres causes the*fibre wadding to be bulky and to obtain spring-back properties, i.e. the fibre wadding will spring back subsequent to having been com- pressed, for instance by *the weight of the user.
  • Another method of increasing the stability of the wadding is to join the fibres together, for instance by applying heat, so as to obtain a thermobonded wadding.
  • the coarse fibres consist of heat-meltable so- called thermoplastic fibres of the type bicomponent fibres
  • the fibres in their molten state function as a binder in such thermobonded wadding, without needing to use additional binder.
  • Another advantage obtained with bonded wadding is that it- can be handled in production much more readily than non-bonded wadding.
  • the fine fibres are intended to fill the empty spaces between the coarse fibres, so that the fibre wadding will obtain a structure comprising many fine capil- laries, which is a prerequisite for liquid transport in the wadding.
  • a particular advantage is afforded when the fine fibre is a hydrofilic fibre, since the wadding will therewith also be absorbent to some extent.
  • the present invention thus provides a thermobonded wadding which is both dense, bulky, shape-stable and springy and which will both absorb and transport liquid.
  • Figure 1 is a view from above of an absorbent article which includes an inventive absorbent body, with the side intended to face towards the user facing the viewer;
  • Figure 2 is a sectional view of a first embodiment of the absorbent article, taken on the line II-II in Figure 1;
  • Figure 3 is a sectional view of a second embodiment of the absorbent article, taken along the same line II-II in Figure 1.
  • FIGS 1 and 2 illustrate schematically a diaper 1, which is representative of an absorbent article.
  • the diaper 1 comprises a liquid-permeable layer 2, suitably a non-woven fabric, an absorbent pad 3 which is posi ⁇ tioned beneath the layer 2 and which includes a liquid- receiving layer 4 and an absorbent layer 5 positioned beneath the liquid-receiving layer.
  • a liquid-impermeable layer 6 Positioned beneath the absorbent layer 5 is a liquid-impermeable layer 6 which may be made, for instance, of liquid-proof poly ⁇ ethylene film or a liquid-proof plastic film which is vapour and air permeable.
  • the liquid-impermeable layer 6 and the liquid permeable layer 2 extend somewhat beyond the edges of the absorbent pad 3 and are bonded together with the aid of an adhesive, in a conventional manner.
  • the two layers 2, 6 can also be joined to the absorbent pad 3 in a desired manner if found suitable, for instance in order to stabilize the absorbent pad.
  • the liquid-receiving layer 4 of the absorbent pad 3 comprises fibre wadding which includes a mixture of coarse and fine fibres.
  • the heat- meltable fibres may comprise, for instance, polyester fibres, polyethylene fibries, bicomponent fibres or mixtures thereof. It is particularly preferred to use bicomponent fibres where the components consist of polypropylene/polyethylene, polyester/polyester, poly ⁇ ester/polyethylene.
  • a bicomponent fibre consisting of a polypropylene core and a polyethylene casing.
  • Polyethylene namiiiy has a lower melting point than polypropylene and heating of the bicomponent fibre to a temperature higher than the melting point of polyethylene but lower than the melting point of poly ⁇ propylene will result in melting of the polyethylene component while leaving the polypropylene component unaffected.
  • the polyethylene component will function as a binder for stabilizing the wadding, therewith obviating the iceed to add a separate binder.
  • the hydrofilic fibres will preferably be viscose fib ⁇ res.
  • the actual mixture is preferably homogenous, although a hetrogenous ittixture is also conceivable.
  • a preferred fibre wadding has a density of 0.05-0.07 g/cm 3 and a grammage of about 200 g/m2.
  • the fibre wadding can be produced in any manner known to those skilled in the art, for instance by carding or air- laying.
  • the absorption layer 5 may include any suitable absorp- tion material, for instance cellulose fluff in which superabsorbing polymers may be dispersed.
  • the superab- sorbents may be mixed homogenously with the cellulose fibres or arranged in layers on or within the absorp ⁇ tion layer 5.
  • the superabsorbents may be used in seve- ral different forms, i.e. fibre or particle form.
  • Figure 3 illustrates a second embodiment of an inven ⁇ tive diaper which, similar to the earlier embodiment, comprises a liquid-permeable layer 2, suitably a non- woven fabric, which is intended to lie against the skin of the wearer in use.
  • a liquid-permeable layer 2 suitably a non- woven fabric
  • an absorbent pad 7 which includes a liquid-receiving layer 4 of the same kind as that used in the Figure 2 embodi ⁇ ment, and an absorption laminate 8 which is placed beneath the liquid-receiving layer.
  • the absorption laminate 8 includes two material layers 9, 10 and an absorption layer placed between said two material layers.
  • the material layers 9, 10 may consist, for instance, of a tissue layer or some other compressed cellulose-fibre layer.
  • the absorption layer 11 will preferably consist of superabsorbents.
  • the absorption laminate 8 may also be constructed in the manner taught by Swedish Patent Application No. 8901964-0, i.e.
  • the number of absorption layers 11 may be more than one and the superabsorbents present in the various layers may exhibit mutually different absorption properties.
  • a liquid-impermeable layer 6 of the same kind as that used in the Figure 2 embodiment is placed on the side of the absorbent pad 7 distal from the wearer.
  • the earlier described features of the liquid-permeable and liquid-impermeable layers 2, 6 of the Figure 2 embodiment are also applicable to corresponding layers of the Figure 3 embodiment.
  • the diaper may be provided with fastening devices, elastic devices or the like in a known manner, without having any bearing on the invention, and consequently such diaper characteristics have not been shown in the drawings.
  • fastening devices elastic devices or the like
  • elastic devices or the like
  • these articles can be provided, for instance, with means for attachment of the article to underwear, although such means of attachment forms no part of the present invention.
  • Fibre wadding comprising various weight percentages of 20 dtex bicomponent fibres having a polyethylene casing and a polypropylene core, and 1.7 dtex viscose fibre, were tested with respect to thickness in a dry and wet state, at low and high loads respectively.
  • the fibre waddings had a grammage of 200 g/m 2.
  • the thicknesses were measured by placing a plate on the dry fibre waddings and subjecting the waddings to variable loads, whereafter the thickness of the waddings was measured with the aid of a ruler. The thickness was measured at a load of 2.3 g/cm 2 and at a load of 10.5 g/cm2.
  • the lighter load resulted in only slight compression of the fibre wadding and is intended to define a readily measurable starting thickness of the wadding.
  • the fibre waddings were then soaked in water and were allowed to drain until no liquid dripped from the waddings, whereafter the thickness of the waddings was measured in the same way as that used to measure the dry waddings.
  • the values recited in Table 1 are rela ⁇ tive and relate to the respective thickness of a wet and a dry fibre wadding for respective viscose quan ⁇ tities and loads in relation to the thickness of a dry fibre wadding subjected to a low load.
  • the fibre wadding In order to function as a spacing layer between the liquid-permeable layer and the absorption layer, the fibre wadding shall essentially retain its thickness in a wet state when subjected to load.
  • Table 1 shows that in the case of fibre wadding containing 10% and 15% viscose, the relationship between dry and wet wadding is essentially the same at the high load. In the case of wadding containing 20% viscose, a slightly poorer value is obtained, whereas a markedly poorer result is obtained when the wadding contains 30% viscose.
  • Liquid leakage in a sloping plane was measured in respect of a sample body containing fibre wadding whose composition varied between the tests.
  • the test body comprised an outer layer of non-woven fabric which enclosed fibre wadding placed on top of an absorption layer which contained superabsorbents.
  • the absorption layer comprised an upper tissue laminate in which 2.5 g of powdered Aqualic CA W-4 were dispersed, and a bottom tissue laminate in which 2.5 g of powdered Waterlock J 550 were dispersed.
  • Aqualic CA W-4 and Waterlock J 550 are the designations of commercially available superabsorbents.
  • the test body had an elon ⁇ gated rectangular shape and was placed with its lon- gitudinal axis inclined at 30° to the horizontal plane. 100 ml of 0.9% NaCl (aq) were delivered to the upper end of the body over a period of 7 seconds. The quan ⁇ tity of non-absorbed liquid was collected at the lower end of the body and weighed. The results are given in Table 2. Table 2
  • Re-wetting was measured for a test body which contained a fibre wadding having a grammage of 150 g/m 2 and of varied composition placed on top of an absorption layer comprising a tissue laminate in which 5.1 g ( ⁇ 0.1 g) of Aqualic CA W-4 were distributed.
  • Re-wetting is a measurement of the amount of liquid discharged from the test body when load is applied thereto.
  • the resiliency of fibre wadding which contains no viscose is superior to fibre wadding in which viscose fibres are included. It has been found that the coarse fibres should suitab ⁇ ly have a size of 17 dtex in order for the wadding to be sufficiently resilient and exhibit sufficient spring-back. Although benefits are obtained with regard to resiliency and spring-back with fibre sizes much greater than 20 dtex, the resultant wadding is stiff and uncomfortable to the wearer.
  • the fine fibres should have a size of 1.5-2 dtex, because coarse fibres do not provide a sufficiently fine capillary system in the wadding.

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Abstract

L'invention concerne une matière absorbante (3) destinée à entrer dans la composition d'articles absorbants à jeter tels que couches, serviettes d'incontinence, serviettes périodiques, protections de sous-vêtements ou articles similaires, et comportant un rembourrage en fibres (4). Le rembourrage en fibres (4) contient un mélange de fibres grosses d'une taille d'au moins 17 dtex et de fibres fines d'une taille d'au plus 2 dtex.
PCT/SE1991/000074 1990-02-01 1991-02-01 Matiere absorbante comportant un rembourrage en fibres WO1991011164A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9000360A SE465806B (sv) 1990-02-01 1990-02-01 Absorptionskropp foer att transportera vaetska i riktning mot ett absorberande skikt i ett foer engaangsanvaendning avsett absorberande alster
SE9000360-9 1990-02-01

Publications (1)

Publication Number Publication Date
WO1991011164A1 true WO1991011164A1 (fr) 1991-08-08

Family

ID=20378427

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1991/000074 WO1991011164A1 (fr) 1990-02-01 1991-02-01 Matiere absorbante comportant un rembourrage en fibres

Country Status (3)

Country Link
AU (1) AU7231791A (fr)
SE (1) SE465806B (fr)
WO (1) WO1991011164A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992011830A3 (fr) * 1991-01-03 1992-10-15 Procter & Gamble Article absorbant dote d'une ame absorbante multicouche a absorption rapide
EP0526225A1 (fr) * 1991-08-02 1993-02-03 JOHNSON & JOHNSON INC. Produit absorbant hygiénique à jeter
EP0528567A1 (fr) * 1991-08-02 1993-02-24 JOHNSON & JOHNSON INC. Produit absorbant hygiénique à jeter
EP0539703A1 (fr) * 1991-09-11 1993-05-05 Kimberly-Clark Corporation Article absorbant
WO1994009737A1 (fr) * 1992-10-26 1994-05-11 The Procter & Gamble Company Article hygienique absorbant a noyau composite
WO1994012713A1 (fr) * 1992-11-20 1994-06-09 Peaudouce Materiau non-tisse multicouche et article d'hygiene absorbant comportant un tel materiau
WO1994016658A1 (fr) * 1993-01-22 1994-08-04 The Procter & Gamble Company Serviette hygienique generalement mince, souple a protuberance centrale absorbante
US5460622A (en) * 1991-01-03 1995-10-24 The Procter & Gamble Company Absorbent article having blended multi-layer absorbent structure with improved integrity
US5486167A (en) * 1991-01-03 1996-01-23 The Procter & Gamble Company Absorbent article having blended multi-layer absorbent structure with improved integrity
US5556392A (en) * 1992-11-20 1996-09-17 Peaudouce Composite nonwoven material and application to any absorbent article of hygiene
US5562650A (en) * 1994-03-04 1996-10-08 Kimberly-Clark Corporation Absorbent article having an improved surge management
AU673174B2 (en) * 1992-04-28 1996-10-31 Molnlycke Ab An absorbent body in an absorbent article, such as a sanitary napkin, a panty protector, incontinence guard, dieper and the like
US5843064A (en) * 1992-11-20 1998-12-01 Peaudouce Non woven material and hygienic absorbent article comprising such material
US5895710A (en) * 1996-07-10 1999-04-20 Kimberly-Clark Worldwide, Inc. Process for producing fine fibers and fabrics thereof
US6042575A (en) * 1990-10-29 2000-03-28 The Procter & Gamble Company Generally thin, flexible, sanitary napkin with central absorbent hump
WO2000061048A1 (fr) * 1999-04-12 2000-10-19 Kao Corporation Couche jetable
US6171291B1 (en) 1990-10-29 2001-01-09 The Procter & Gamble Company Generally thin, flexible, sanitary napkin with central absorbent hump
EP0596191B1 (fr) * 1992-11-06 2001-09-26 Kimberly-Clark Worldwide, Inc. Matière fibreuse laminé, procédé et dispositif pour sa préparation et sa utilisation
EP0636017B2 (fr) † 1992-12-18 2005-06-29 Kimberly-Clark Worldwide, Inc. Produit composite absorbant multicouche

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245017A1 (fr) * 1986-05-02 1987-11-11 Minnesota Mining And Manufacturing Company Tampon de nettoyage
US4798603A (en) * 1987-10-16 1989-01-17 Kimberly-Clark Corporation Absorbent article having a hydrophobic transport layer
EP0327317A2 (fr) * 1988-02-02 1989-08-09 Chisso Corporation Etoffe non tissée renforcée volumineuse

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245017A1 (fr) * 1986-05-02 1987-11-11 Minnesota Mining And Manufacturing Company Tampon de nettoyage
US4798603A (en) * 1987-10-16 1989-01-17 Kimberly-Clark Corporation Absorbent article having a hydrophobic transport layer
EP0327317A2 (fr) * 1988-02-02 1989-08-09 Chisso Corporation Etoffe non tissée renforcée volumineuse

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171291B1 (en) 1990-10-29 2001-01-09 The Procter & Gamble Company Generally thin, flexible, sanitary napkin with central absorbent hump
US6042575A (en) * 1990-10-29 2000-03-28 The Procter & Gamble Company Generally thin, flexible, sanitary napkin with central absorbent hump
WO1992011830A3 (fr) * 1991-01-03 1992-10-15 Procter & Gamble Article absorbant dote d'une ame absorbante multicouche a absorption rapide
TR28310A (tr) * 1991-01-03 1996-04-09 Procter & Gamble Hizli toplama özelligine sahip cok tabakali absorplayici dolgu ihtiva eden absorplayici cisim.
US5486167A (en) * 1991-01-03 1996-01-23 The Procter & Gamble Company Absorbent article having blended multi-layer absorbent structure with improved integrity
US5460622A (en) * 1991-01-03 1995-10-24 The Procter & Gamble Company Absorbent article having blended multi-layer absorbent structure with improved integrity
US5304161A (en) * 1991-01-03 1994-04-19 The Procter & Gamble Company Absorbent article having rapid acquiring, multiple layer absorbent core
US5439458A (en) * 1991-01-03 1995-08-08 The Procter & Gamble Company Absorbent article having rapid acquiring, multiple layer absorbent core
GR920100299A (el) * 1991-08-02 1993-06-07 Johnson & Johnson Inc Μέ?οδος για την ενίσχυση αποδοχής από μέρους του κοινού ενός απορρίψιμου μετά την χρήση απορροφητικού πυρήνα και το προϊόν που προκύπτει.
GR920100297A (el) * 1991-08-02 1993-06-07 Johnson & Johnson Inc Νέο απορρίψιμο μετά την χρήση απορροφητικό προϊόν.
EP0528567A1 (fr) * 1991-08-02 1993-02-24 JOHNSON & JOHNSON INC. Produit absorbant hygiénique à jeter
EP0526225A1 (fr) * 1991-08-02 1993-02-03 JOHNSON & JOHNSON INC. Produit absorbant hygiénique à jeter
EP0539703A1 (fr) * 1991-09-11 1993-05-05 Kimberly-Clark Corporation Article absorbant
AU673174B2 (en) * 1992-04-28 1996-10-31 Molnlycke Ab An absorbent body in an absorbent article, such as a sanitary napkin, a panty protector, incontinence guard, dieper and the like
WO1994009737A1 (fr) * 1992-10-26 1994-05-11 The Procter & Gamble Company Article hygienique absorbant a noyau composite
AU668902B2 (en) * 1992-10-26 1996-05-23 Procter & Gamble Company, The Hygienic absorbent article having blended absorbent core
EP0596191B1 (fr) * 1992-11-06 2001-09-26 Kimberly-Clark Worldwide, Inc. Matière fibreuse laminé, procédé et dispositif pour sa préparation et sa utilisation
US5556392A (en) * 1992-11-20 1996-09-17 Peaudouce Composite nonwoven material and application to any absorbent article of hygiene
AU676236B2 (en) * 1992-11-20 1997-03-06 Peaudouce Non woven multilayer material and hygienic absorbent article comprising such material
US5843064A (en) * 1992-11-20 1998-12-01 Peaudouce Non woven material and hygienic absorbent article comprising such material
US5879344A (en) * 1992-11-20 1999-03-09 Peadouce Composite nonwoven material and its application to any absorbent article of hygiene
WO1994012713A1 (fr) * 1992-11-20 1994-06-09 Peaudouce Materiau non-tisse multicouche et article d'hygiene absorbant comportant un tel materiau
EP0636017B2 (fr) † 1992-12-18 2005-06-29 Kimberly-Clark Worldwide, Inc. Produit composite absorbant multicouche
TR28475A (tr) * 1993-01-22 1996-07-24 Procter & Gamble Merkezi absorplayici tümsege sahip, genel olarak ince esnek adet bezi.
WO1994016658A1 (fr) * 1993-01-22 1994-08-04 The Procter & Gamble Company Serviette hygienique generalement mince, souple a protuberance centrale absorbante
US5562650A (en) * 1994-03-04 1996-10-08 Kimberly-Clark Corporation Absorbent article having an improved surge management
US5895710A (en) * 1996-07-10 1999-04-20 Kimberly-Clark Worldwide, Inc. Process for producing fine fibers and fabrics thereof
WO2000061048A1 (fr) * 1999-04-12 2000-10-19 Kao Corporation Couche jetable
EP1470810A3 (fr) * 1999-04-12 2005-02-09 Kao Corporation Couche-culotte jetable
US6891080B2 (en) 1999-04-12 2005-05-10 Kao Corporation Disposable diaper and absorbent member used therein
US6649810B1 (en) 1999-04-12 2003-11-18 Kao Corporation Disposable diaper with absorbent member
CN1301696C (zh) * 1999-04-12 2007-02-28 花王株式会社 一次性尿布

Also Published As

Publication number Publication date
SE9000360D0 (sv) 1990-02-01
SE9000360L (sv) 1991-08-02
SE465806B (sv) 1991-11-04
AU7231791A (en) 1991-08-21

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