US3888256A - Layered absorbant pad material - Google Patents

Layered absorbant pad material Download PDF

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US3888256A
US3888256A US332229A US33222973A US3888256A US 3888256 A US3888256 A US 3888256A US 332229 A US332229 A US 332229A US 33222973 A US33222973 A US 33222973A US 3888256 A US3888256 A US 3888256A
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layer
swelling
absorbent
liquid
particles
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Hans Studinger
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—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
    • A61F13/53743—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
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/42—Use of materials characterised by their function or physical properties
    • A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
    • 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
    • A61F13/84—Accessories, not otherwise provided for, for absorbent pads
    • A61F13/8405—Additives, e.g. for odour, disinfectant or pH control
    • 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
    • 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
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23907—Pile or nap type surface or component
    • Y10T428/23921—With particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • Y10T428/31779—Next to cellulosic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/3188—Next to cellulosic
    • Y10T428/31884—Regenerated or modified cellulose
    • Y10T428/31891—Where addition polymer is an ester or halide

Definitions

  • Kendell [30] Foreign Application Priority Data Attorney, Agent, or Firm-Ross, Ross & Flavin F b. 22, 1972 G 2208126 6 many 57 ABSTRACT [52] US. Cl. 128/296; 128/284; 128/287; A layered bsorbent pad material comprising an ab- 128/290 R; 428/87; 428/475; 428/510 sorbent layer disposed between upper and lower sur- [51] Int. Cl.
  • This invention relates to layered absorbent pad material for hygienic purposes such as absorbent, sanitary or invalid's underlays, diapers, sanitary towels and the like, and comprises an absorbent layer disposed between an upper surface layer and a lower surface layer and incorporating a swelling substance.
  • swelling substance means a substance which swells upon absorbing a liquid, such as water, the water being retained by adsorption.
  • Absorbent pads of this kind are already known.
  • absorbent pads which are to be used, for example, for the production of sanitary towels and for other sanitary and surgical purposes, in order to increase their absorptive capacity, adsorptive substances which are capable of combining chemically with water contained in the liquid expected to be absorbed by the pads.
  • Organic natural products such as potato flour, cereal starch, gelatine and the like, have been proposed as agents on this score.
  • Hydrophilic colloids of this kind are not, however, generally acceptable as swelling substances in hygienic or sanitary articles of the kinds mentioned. Only in recent times has it been possible to find substances having better absorptive capacities and having in addition, the property of being substantially immune to the growth of bacteria.
  • swelling substance carboxymethyl cellulose of which the degree of etherification is adjusted to values from 0.05 to 0.3.
  • polyacryl amides, as well as sulphonated polystyrenes, having a specific chemical structure are recommended.
  • cross-linked polymers of the polyethylene oxide type or of the polyethylene imine type are also suitable for the same purpose.
  • the swelling substances should be in the form of powder or granulate, and that they should be accommodated either in a special bag or envelope of a material which is pcrvious to liquid, or to introduce the swelling substances into the absorbent pad in a mixture with cellulose wadding.
  • German Offenlegungschrift No. 1,642,072 it has also been proposed initially to coat a suitable liquid-pervious foil with a layer of adhesive and then to sprinkle the layer of adhesive with swelling-substance in powder form. The individual particles of the powder then stick fast by their undersides on the layer of adhesive and are thus retained in position. The flat product obtained in this way is then introduced into the absorbent layer at the side which lies downwards in use or is incorporated into the centre of the absorbent layer.
  • absorbent pads containing a swelling substance have a considerably higher liquid absorption capacity.
  • cellulose can, as a rule, absorb only about 20 grammes of water per gramme of cellulose
  • the liquid absorption capacity of the said swelling substances can amount to up to I50 grammes of water per gramme of swelling substances depending on the chemical nature of the substance.
  • the water is chemically completely adsorbed by the swelling substances and is retained by chemical combination e.g. by principal valencies. This means that the swelling substance, once it has taken up the water does not release it again, even under pressure loading or upon squeezing, which improves the utility of such substances.
  • the water in paper or cellulose is largely retained by secondary valency forces or by capillary forces, which means there is much weaker retention so that such substances will readily give up the absorbed liquid under the effect of pressure, like a sponge.
  • the pad material incorporates a particulate swelling substance is arranged exclusively or additionally in one of the layers, lying at the top in use, of the absorbent body or of the envelope and in that the distribution of the particles throughout the layer of swelling substance is such that the spacing between adjacent particles is no greater than half of the particle diameter increase which occurs upon swelling of said particles.
  • absorbent pads constructed in this way, upon wetting of the pad the wetting liquid initially enters in the conventional manner into the absorbent pad and flows through the layer of swelling sub stance arranged at the top or largely at the top, resulting in the particles of swelling substance being moistened and slowly beginning to swell. Surplus liquid flows past the particles of swelling substance and into the absorbent layer lying therebelow, which absorbent layer consists, for example of cellulose wadding, crepe paper plies or the like.
  • the swelling procedure itself may last. for example, from one to five minutes depending on the fineness of grain of the swelling substance. A considerable increase in diameter of the individual particles occurs, so that these, because of their density of distribution, coalesce into a poreless liquid-impervious gel-like barrier layer. lf subsequently to the swelling a fairly severe pressure loading is imposed on the pad or the pad is squeezed locally, the liquid stored like a sponge by the absorbent layer (cellulose wadding layer or crepe paper layer) is no longer able to penetrate the barrier layer and to rewet the exterior of the absorbent pad outwardly. What is advantageous in this connection is the fact that once the chemical reaction of liquid adsorption is once initiated, the swelling proceeds initially slowly and then comparatively rapidly.
  • the swelling substance is arranged directly below the filter layer or one of the upper surface layers of the pad material, and that it should be in one or more layers itself.
  • the swelling substance should preferably have a granulate form and be held fast, by way of example adhered, on a liquid-pervious carrier or support sheet. This carrier sheet or several of these sheets arranged one above the other in layers can then be introduced in the manufacture of the absorbent pad.
  • the cellucotton acts as a support and filter layer which prevents the swelling substance from escaping from the absorbent pad.
  • FIG. 1 is an enlarged diagrammatic sectional view of a preferred form of the absorbent pad material of the invention
  • FIG. 2 is a view similar to FIG. 1, but showing the material subjected to pressure after wetting and before completion of swelling;
  • FIG. 3 is a view similar to FIG. 1 but showing the material after swelling has taken place;
  • FIG. 4 is a view similar to FIG. 3, but showing the material subjected to pressure loading.
  • FIG. 5 is a diagrammatic plan illustrating the particle distribution in the swelling substance layer in the material of FIGS. 1 to 4.
  • the layered absorbent pad material illustrated in the drawings comprises a plurality of superimposed layers consisting of flat areal structures or sheets, and absorbent substances.
  • Upper surface layer 1 is in the form of a plasticsbound fibre fleece or web which imparts to the entire absorbent pad material a textilelike texture which is kind to the skin.
  • this fleece substance layer 1 there is disposed one, or several, layers 2 of cellucotton acting as a filter layer and serving to prevent swelling substances (yet to be described). in the unswollen state, from escaping from the material, eg. as a result of rough treatment of the absorbent pad material.
  • the powdery or granular swelling substance (which may consist for example of polyacrylamide, sulphonated polystyrene or other suitable substance) is fixed, for example adhered, to a carrier sheet of cellucotton.
  • a relatively thick layer 4 which consists of one or morelaps of cellulose wadding.
  • Crepe paper can, if desired, be incorporated into this layer; furthermore, intermediate layers of cellucotton can be present therein, those serving for example as carriers for disinfecting or deodorising substances.
  • lower layer 5 there are once more one or more surface layers which may also consist of cellucotton, plastics-bound fibre fleece or which may be of liquid-impervious foil, for example thin polyethylene foil.
  • the layer 3' remains liquid-impervious so that no liquid can be expressed upwards out of the absorbent layer 4, and the diaper, invalid underlay, sanitary towel or the like remains dry even if subjected to violent treatment resulting in considerable surface deformation of the pad.
  • the layer 3 of swelling substance not as shown above the absorbent pad layer 4, but to accommodate it within this layer, but near to its upper surface.
  • the layer 3 of swelling substance were, for example, accommodated in the centre of the absorbent layer or in the latter near to its lower surface, naturally the drying and barrier effect above-discussed would not be achieved.
  • this does not preclude the possibility of providing additional swelling substance layers in the centre and/or near the bottom surface of absorbent layer, over and above the layer 3 at or near the top surface of the absorbent layer 3, if this is desired and is acceptable for economic reasons.
  • FIG. 5 several particles 12 of the swelling sub stance are shown, very diagrammatically, as lying sideby-side.
  • the particles of swelling substance naturally will not be regularly-disposed as illustrated nor will they be in the form of spheres, but will be more or less non-uniformly shaped structures; the fundamental requirement for the distribution of the particles remains however,, the same.
  • the particles 12 of swelling substance (which are shown in their non-swollen conditions in full lines) absorb water in the swelling procedure, and combine chemically therewith; as a result they increase in volume and consequently in diameter as indicated in dotted lines at 12'.
  • An essential feature of the absorbent pad material of this invention is that the distribution of the unswollen particles ll of swelling substance is such that at no point throughout the layer is the spacing 13 of the particles 12 of swelling substance from one another greater than half the increase in diameter which occurs upon swelling thereof. Only with observance of this condition is it ensured that the particles of swelling substance coalesce tightly and thus form the liquid-impervious barrier layer 3'. Theoretically there could remain, between the coalesced particles 12, a free space which considered twodimensionally is an enveloping rectangle. but considered three-dimensionally is an enveloping octahedron. Microscopic observations show, however, that this free space in fact does not remain, but becomes filled as a result of deformation of the swollen particles, and the entire layer thus coalesces into a uniform mass.
  • the pad or the pad ma terial may be enveloped or faced, except at its upper surface layer, by an additional water-impervious envelope or foil.
  • a layered absorbent hygienic pad of joinedtogether layers comprising:
  • plastics-bound fiber fleece an uppermost surface layer of plastics-bound fiber fleece, a next-adjacent carrier filter sheet of cellucotton, a next-adjacent layer of granulated particulate swelling substance formed from the group consisting of polyacrylamide or sulphonated polystyrene with spacings between adjacent particles,
  • an absorbent layer consisting of one or more laps of cellulose wadding and being free of any swelling substance, and a lowermost surface layer of a material formed from the group consisting of a plasticsbound fiber fleece or a liquidimpervious foil with the distribution of the particles of the layer of the swelling substance being such that the spacing between adjacent particles is no greater than half of the particle diameter increase realized upon parti cle swelling.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Hematology (AREA)
  • Materials Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
US332229A 1972-02-22 1973-02-13 Layered absorbant pad material Expired - Lifetime US3888256A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2208126 1972-02-22

Publications (1)

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US3888256A true US3888256A (en) 1975-06-10

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US (1) US3888256A (enrdf_load_stackoverflow)
DE (1) DE2208126B1 (enrdf_load_stackoverflow)
FR (1) FR2173047B1 (enrdf_load_stackoverflow)
GB (1) GB1400124A (enrdf_load_stackoverflow)

Cited By (65)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921232A (en) * 1974-03-29 1975-11-25 Procter & Gamble Self-inflating structure
US4054141A (en) * 1976-04-06 1977-10-18 Julius Schwaiger Absorptive material for hygienic purposes
US4055184A (en) * 1976-05-10 1977-10-25 Colgate-Palmolive Company Absorbent pad
US4055180A (en) * 1976-04-23 1977-10-25 Colgate-Palmolive Company Absorbent article with retained hydrocolloid material
US4105033A (en) * 1974-12-09 1978-08-08 Personal Products Company Powdered grafted cellulose
US4144886A (en) * 1975-10-24 1979-03-20 Hoechst Aktiengesellschaft Absorbent laminate
US4235237A (en) * 1978-05-08 1980-11-25 Johnson & Johnson Absorbent open network structure
US4293609A (en) * 1979-07-09 1981-10-06 The Dow Chemical Company Flexible absorbent laminates
US4297410A (en) * 1978-10-12 1981-10-27 Kao Soap Co., Ltd. Absorbent material
WO1982003324A1 (en) * 1981-03-31 1982-10-14 Mitchell James G Absorbent pads,incontinence care products and methods of production
US4381784A (en) * 1981-02-17 1983-05-03 Kimberly-Clark Corporation Sanitary appliance containing blood gelling agent
US4500315A (en) * 1982-11-08 1985-02-19 Personal Products Company Superthin absorbent product
JPS6045017U (ja) * 1983-09-05 1985-03-29 和商株式会社 使い捨ておむつ
US4537590A (en) * 1982-11-08 1985-08-27 Personal Products Company Superthin absorbent product
US4540454A (en) * 1982-11-08 1985-09-10 Personal Products Company Method of forming a superthin absorbent product
US4568341A (en) * 1982-03-10 1986-02-04 James G. Mitchell Absorbent pads, incontinence care products and methods of production
US4578068A (en) * 1983-12-20 1986-03-25 The Procter & Gamble Company Absorbent laminate structure
US4600458A (en) * 1983-12-20 1986-07-15 The Procter & Gamble Co. Method of making an absorbent laminate structure
DE3719069A1 (de) * 1987-06-06 1988-12-15 Ver Papierwerke Ag Hoeschenwindel
US4846813A (en) * 1985-09-25 1989-07-11 Kimberly-Clark Corporation Self-sealing fluid absorbent article
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DE3719069A1 (de) * 1987-06-06 1988-12-15 Ver Papierwerke Ag Hoeschenwindel
US4985023A (en) * 1988-05-09 1991-01-15 Dow Corning Corporation Antimicrobial superabsorbent articles
US6270893B1 (en) 1989-03-20 2001-08-07 Weyerhaeuser Company Coated fiber product with adhered super absorbent particles
US5013309A (en) * 1989-04-24 1991-05-07 Kem-Wove Incorporated Incontinent pad with high absorbent packet
US5330817A (en) * 1989-05-15 1994-07-19 Milliken Research Corporation Incontinence pad
US5395359A (en) * 1991-01-25 1995-03-07 Kao Corporation Absorbent article
US5693411A (en) * 1992-08-17 1997-12-02 Weyerhaeuser Company Binders for binding water soluble particles to fibers
US6340411B1 (en) 1992-08-17 2002-01-22 Weyerhaeuser Company Fibrous product containing densifying agent
US5308896A (en) * 1992-08-17 1994-05-03 Weyerhaeuser Company Particle binders for high bulk fibers
US5447977A (en) * 1992-08-17 1995-09-05 Weyerhaeuser Company Particle binders for high bulk fibers
US7144474B1 (en) 1992-08-17 2006-12-05 Weyerhaeuser Co. Method of binding particles to binder treated fibers
US5538783A (en) * 1992-08-17 1996-07-23 Hansen; Michael R. Non-polymeric organic binders for binding particles to fibers
US5543215A (en) * 1992-08-17 1996-08-06 Weyerhaeuser Company Polymeric binders for binding particles to fibers
US5547541A (en) * 1992-08-17 1996-08-20 Weyerhaeuser Company Method for densifying fibers using a densifying agent
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US20030201051A1 (en) * 1992-08-17 2003-10-30 Weyerhaeuser Company Particle binding to fibers field of the invention
US5571618A (en) * 1992-08-17 1996-11-05 Weyerhaeuser Company Reactivatable binders for binding particles to fibers
US5589256A (en) * 1992-08-17 1996-12-31 Weyerhaeuser Company Particle binders that enhance fiber densification
US5607759A (en) * 1992-08-17 1997-03-04 Weyerhaeuser Company Particle binding to fibers
US5609727A (en) * 1992-08-17 1997-03-11 Weyerhaeuser Company Fibrous product for binding particles
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US5614570A (en) * 1992-08-17 1997-03-25 Weyerhaeuser Company Absorbent articles containing binder carrying high bulk fibers
US5641561A (en) * 1992-08-17 1997-06-24 Weyerhaeuser Company Particle binding to fibers
US5672418A (en) * 1992-08-17 1997-09-30 Weyerhaeuser Company Particle binders
US6627249B2 (en) 1992-08-17 2003-09-30 Weyerhaeuser Company Method of enhancing blood absorbence by superabsorbent material
US6596103B1 (en) 1992-08-17 2003-07-22 Weyerhaeuser Company Method of binding binder treated particles to fibers
US6521339B1 (en) 1992-08-17 2003-02-18 Weyerhaeuser Company Diol treated particles combined with fibers
US5789326A (en) * 1992-08-17 1998-08-04 Weyerhaeuser Company Particle binders
US6521087B2 (en) 1992-08-17 2003-02-18 Weyerhaeuser Company Method for forming a diaper
US5807364A (en) * 1992-08-17 1998-09-15 Weyerhaeuser Company Binder treated fibrous webs and products
US6461553B1 (en) 1992-08-17 2002-10-08 Weyerhaeuser Method of binding binder treated particles to fibers
US6425979B1 (en) 1992-08-17 2002-07-30 Weyerhaeuser Company Method for making superabsorbent containing diapers
US6395395B1 (en) 1992-08-17 2002-05-28 Weyerhaeuser Company Method and compositions for enhancing blood absorbence by superabsorbent materials
US6391453B1 (en) * 1992-08-17 2002-05-21 Weyernaeuser Company Binder treated particles
US5998032A (en) * 1992-08-17 1999-12-07 Weyerhaeuser Company Method and compositions for enhancing blood absorbence by superabsorbent materials
US6071549A (en) * 1992-08-17 2000-06-06 Weyerhaeuser Company Binder treated fibrous webs and products
US5300192A (en) * 1992-08-17 1994-04-05 Weyerhaeuser Company Wet laid fiber sheet manufacturing with reactivatable binders for binding particles to fibers
US5352480A (en) * 1992-08-17 1994-10-04 Weyerhaeuser Company Method for binding particles to fibers using reactivatable binders
US5300104A (en) * 1992-10-20 1994-04-05 Yvon Gaudreault Thermotherapeutic pad
US5789076A (en) * 1994-02-07 1998-08-04 Showa Denko K.K. Liquid-absorbent sheet and method for storing food using the same
US5558655A (en) * 1994-05-03 1996-09-24 Confab, Inc. Absorbent article with dry surface composite construction
US5447788A (en) * 1994-05-16 1995-09-05 Kimberly Clark Corporation Porous, nonwoven liquid-activated barrier
US5810798A (en) * 1995-06-30 1998-09-22 Kimberly-Clark Worldwide, Inc. Absorbent article having a thin, efficient absorbent core
US5778457A (en) * 1995-12-20 1998-07-14 Intellitecs International Ltd. Hygienic panty and quick-attach pad
US5819317A (en) * 1995-12-20 1998-10-13 Intellitecs International Ltd. Infant t-shirt
US5677028A (en) * 1996-04-09 1997-10-14 Wearever Health Care Products, Llc Absorbent material
US5879487A (en) * 1996-04-09 1999-03-09 Wearco Llc Absorbent material and method for making same
US5906876A (en) * 1996-07-17 1999-05-25 Intellitecs International, Inc. Absorbent fabric and undergarments incorporating the fabric
US6383960B1 (en) 1997-10-08 2002-05-07 Kimberly-Clark Worldwide, Inc. Layered absorbent structure
US20040033750A1 (en) * 1998-06-12 2004-02-19 Everett Rob D Layered absorbent structure with a heterogeneous layer region
US6710225B1 (en) 1998-06-15 2004-03-23 Kimberly-Clark Worldwide, Inc. Layered absorbent structure with a zoned basis weight
US6416697B1 (en) 1999-12-03 2002-07-09 Kimberly-Clark Worldwide, Inc. Method for obtaining a dual strata distribution of superabsorbent in a fibrous matrix
US6437214B1 (en) 2000-01-06 2002-08-20 Kimberly-Clark Worldwide, Inc. Layered absorbent structure with a zoned basis weight and a heterogeneous layer region
US20060199079A1 (en) * 2001-03-13 2006-09-07 Sony Corporation Aqueous electrolyte solution absorber and method for producing it
US7838155B2 (en) * 2001-03-13 2010-11-23 Sony Corporation Aqueous electrolyte solution absorber and method for producing it
US20040058605A1 (en) * 2002-09-19 2004-03-25 Hansen Michael R. Polysaccharide treated cellulose fibers
US20050000669A1 (en) * 2003-03-14 2005-01-06 Hugh West Saccharide treated cellulose pulp sheets
US20050010183A1 (en) * 2003-06-24 2005-01-13 Weyerhaeuser Company Absorbent structure for absorbing blood
US20050031841A1 (en) * 2003-08-05 2005-02-10 Weyerhaeuser Company Attachment of superabsorbent materials to fibers using oil
US20050112979A1 (en) * 2003-11-24 2005-05-26 Sawyer Lawrence H. Integrally formed absorbent materials, products incorporating same, and methods of making same
US20050133180A1 (en) * 2003-12-19 2005-06-23 Hugh West Densification agent and oil treated cellulose fibers
US20050178518A1 (en) * 2004-02-13 2005-08-18 Hugh West Sodium sulfate treated pulp
US20070107862A1 (en) * 2004-02-13 2007-05-17 Weyerhaeuser Co. Sodium sulfate treated pulp
US20060010663A1 (en) * 2004-07-17 2006-01-19 Andrew Szypka Absorbent sleeve to enclose a limb and absorb seepage from a cadaver
US20130122242A1 (en) * 2010-11-03 2013-05-16 Dongguan Titlis Polymer Science Co., Ltd. Cellucotton Having Vertical Structure That Enables Bi-Directional Elasticity, Production Device and Method Thereof
US20160222685A1 (en) * 2015-01-31 2016-08-04 Ramshorn Corporation Concrete curing blanket
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US20230404350A1 (en) * 2022-06-13 2023-12-21 Samsung Electronics Co., Ltd. Wet robot cleaner and contamination prevention module used therefor

Also Published As

Publication number Publication date
FR2173047A1 (enrdf_load_stackoverflow) 1973-10-05
FR2173047B1 (enrdf_load_stackoverflow) 1978-10-20
GB1400124A (en) 1975-07-16
DE2208126B1 (de) 1973-07-05

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