US3595235A - Multilayer absorbent pad - Google Patents

Multilayer absorbent pad Download PDF

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Publication number
US3595235A
US3595235A US825247A US3595235DA US3595235A US 3595235 A US3595235 A US 3595235A US 825247 A US825247 A US 825247A US 3595235D A US3595235D A US 3595235DA US 3595235 A US3595235 A US 3595235A
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United States
Prior art keywords
absorbent
layer
pad
liquid
layers
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Expired - Lifetime
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US825247A
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English (en)
Inventor
Paul W Jespersen
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Georgia Pacific LLC
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Georgia Pacific LLC
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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
    • A61F13/535—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 inhomogeneous in the plane of the pad, e.g. core absorbent layers being of different sizes
    • 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
    • A61F13/01—Non-adhesive bandages or dressings
    • A61F13/01008—Non-adhesive bandages or dressings characterised by the 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
    • 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
    • A61F13/53704—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 an inhibiting function on liquid propagation
    • 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
    • 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
    • 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
    • A61L15/52—Water-repellants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/15203—Properties of the article, e.g. stiffness or absorbency
    • A61F13/15211—Properties of the article, e.g. stiffness or absorbency soluble or disintegratable in liquid
    • 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
    • A61F2013/00361—Plasters
    • A61F2013/00727—Plasters means for wound humidity control
    • A61F2013/00731—Plasters means for wound humidity control with absorbing pads
    • A61F2013/00744—Plasters means for wound humidity control with absorbing pads containing non-woven
    • 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
    • A61F13/51—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
    • A61F2013/51441—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous 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
    • A61F13/51—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
    • A61F2013/51441—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material
    • A61F2013/51443—Backsheet, i.e. the impermeable cover or layer furthest from the skin characterised by the material being a fibrous material being impervious to fluids and being air permeable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • A61F2013/530131—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made in fibre but being not pulp
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/53—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium
    • 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
    • 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
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    • 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
    • A—HUMAN NECESSITIES
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    • 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
    • A61F2013/53765—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 characterized by its geometry
    • A61F2013/53782—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 characterized by its geometry with holes

Definitions

  • An absorbent pad useful as a diaper 128/290 R napkin, or medical dressing which comprises two superposed lnLCl A611 13/16 liquid-absorbent layers d a liquid-resistant layer disposed Field 0 between the absorbent layers The surfaces of the ab.
  • 1 296 sorbent layers have different areas and the surfaces of the resistant layer facing the absorbent layers each have less area Rehnnm CM than the absorbent layer facing surface of greater area so that UNITED STATES PATENTS liquid flowing into and through the absorbent layer having the 1,643,615 9/1927 Williams 128/290 facing surface of lesser area and contacting the resistant layer l/ 1932 Mather.... 128/290 will flow about the edges of the resistant layer into the absor- 2,929,379 3/1960 Poulsen 128/290 bent layer having the facing surface of greater area.
  • This invention relates to an absorbent pad, and more particularly to a multilayer absorbent pad having a relatively high capacity for retaining liquids.
  • absorbent pads are well known; such pads being principally used for absorbing and retaining liquids, and exudates discharged from the body. Thus, absorbent pads have been employed as diapers, sanitary napkins and medical dressings.
  • absorbent pads made of nonwoven sheets do not disperse the liquid being absorbed uniformly throughout the pad. The liquid thus penetrates a portion of the pad before all portions of the pad have been wetted. This situation constitutes not only a source of discomfort to the user of the pad but also an inefficient use of the nonwetted portions of the pad.
  • the absorbent pad of the present invention minimizes the foregoing problem.
  • the absorbent pad of the invention comprises; first and second superposed liquidabsorbent layers, the surface of the first layer which faces the second layer having less area than the surface of the second layer which faces the first layer; and a liquid-resistant layer disposed between the absorbent layers, the surfaces of the resistant layer which face the absorbent layers each having less area than said second absorbent layer facing surface, the pad being adapted to be worn with the first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer.
  • the surfaces of the resistant layer which face the absorbent layers preferably each have approximately the same area and dimensions as said first absorbent layer facing surface.
  • the pad also includes a liquid-dispersant layer disposed between the second absorbent and resistant layers, the surfaces of the dispersant layer which face the second absorbent and resistant layers each having approximately the same area and dimensions as said second absorbent layer facing surface so that the dispersant layer will distribute liquid flowing about the edges of the resistant layer across said second absorbent layer facing surface.
  • FIG. 1 is a plan view of the preferred embodiment of the absorbent pad of the invention.
  • FIG. 2 is a sectional view taken along line 2-2 of FIG. 1.
  • Pad 10 comprises a plurality of superposed layers, preferably all of which are disintegratable in water, and including first and second liquid-absorbent layers 12 and 14.
  • Pad 10 is adapted to be worn with layer 12 adjacent the body of a user. Therefore, to facilitate the description of pad 10, the side of the pad adapted to be worm adjacent the body will be referred to as the inner side and the side of the pad adapted to be worn away from the body will be referred to as the outer side.
  • a similar reference system will be used for describing the relationships between the various layers comprising pad 10.
  • Layers l2 and 14 comprise nonwoven sheets of liquid-absorbent material, such as cellulosic fibers, and/or organic noncellulosic particles and/or fibers as disclosed in Torr US. Pat. Nos. 3,347,236 and 3,070,095.
  • such organic noncellulosic particles and/or fibers preferably comprise the particles and/or fibers of a substance selected from the group consisting of blood albumin, egg albumin, starches, pectin, algin, karaya, tragacanth and guar gums, natural and synthetic gums of polysaccharide character, chemically modified starches, and chemically modified natural and synthetic gums of polysaccharide character.
  • layer 12 is narrower than layer 14 so that the outer surface of layer 12 has less area than the inner surface of layer 14, i.e. the surface of layer 12 which faces layer 14 has less area than the surface of layer 14 which faces layer 12. Also, layer 12 is transversely centered on layer 14.
  • Pad 10 also includes a liquid-resistant layer 16 disposed between absorbent layers 12 and 14.
  • Layer 16 may comprise a fluid-impervious sheet, but preferably comprises an air-pervious, substantially liquid-impervious flexible sheet; the term substantially liquid-impervious meaning penetrable by liquid after continuous exposure thereto for a period greater than several seconds, e.e. l5 minutes.
  • Such sheets may comprise a nonwoven sheet of cellulosic fibers having a liquid-repellant coating thereon, i.e. a coating of latex, size or a foam-applied organic suspension, or a sheet of perforated plastic film.
  • the length and width of layer 16 are less than the length'and width of layer 14 so that the inner and outer surfaces of layer 16 each have less area than the inner surface of layer 14, i.e. the surfaces of layer 16 which face layers 12 and 14 each have less area than the surface of layer 14 which faces layer 12.
  • the length and width of layer 16 are approximately the same as the length and width of layer 12 so that the inner and outer surfaces of layer 16 each have approximately the same area as the outer surface of layer 12, i.e. the surfaces of layer 16 which face layers 12 and 14 each have approximately the same area and dimensions as the surface of layer 12 which faces layer 14.
  • Pad 10 further includes a liquid-dispersant layer 18 disposed between outer absorbent layer 14 ad resistant layer 16.
  • Layer 18 comprises a nonwoven sheet of material having a substantially higher capillarity than the material from which absorbent layers 12 and 14 are comprised, such as a creped sheet of cellulosic fibers.
  • the length and width of layer 18 are approximately the same as the length and width of layer 14 so that the inner and outer surfaces of layer 18 each have approximately the same area as the inner surface of layer 14, Le. the surfaces of layer 18 which face layers 14 and 16 each have approximately the same area and dimensions as the surface of layer 14 which faces layer 12.
  • Pad 10 additionally includes a cover 20 disposed about absorbent layers 12 and I4 and having an inner portion 22 and an outer portion 24. Cover portions 22 and 24 hold the various layers of pad 10 together in assembled condition.
  • Outer portion 24 is disposed adjacent the outer surface of outer absorbent layer 14 and has approximately the same length and width as layer 14. Similarly to resistant layer 16, outer portion 24 may comprise a fluid-impervious sheet, but preferably comprises an air-pervious, substantially liquid-im pervious, flexible sheet.
  • Inner portion 22 is disposed adjacent the inner surface of inner absorbent layer 12 with the edges thereof extending beyond the edges of outer absorbent layer 14 and outer portion 24. The edges of portion 22 are wrapped around the edges of portion 24 and are secured to the outer surface of the latter in any convenient manner, as by adhesive bonding or heat sealing. Inner portion 22 comprises a liquid-pervious, nonwoven sheet of nonwettable material, such as a sheet of rayon fibers.
  • Pad further includes a second liquid-dispersant layer 26 disposed between inner absorbent layer 12 and inner cover portion 22.
  • layer 26 comprises a non woven sheet of material having a substantially higher capillarity than the material from which absorbent layers 12 and 14 are comprised, such as a creped sheet of cellulosic fibers.
  • the length and width of layer 26 are approximately the same as the length and width of layer 12 so that the inner and outer surfaces of layer 26 each have approximately the same area as the inner surface of layer 12, ie the surfaces of layer 26 which face layer 12 and cover portion 22 each have approximately the same area and dimensions as the surface of layer 12 which faces portion 22.
  • pad 10 is adapted to be worn with absorbent layer 12 adjacent the body of a user.
  • cover portions 22 thus is placed in intimate contact with the body so that liquids or exudates discharged from the body flow into the pad in the direction of arrow 28 (H6. 2).
  • the liquid passes through inner cover portion 22 without being absorbed thereby so that the portion of the pad in intimate contact with the body remains relatively dry to provide maximum comfort.
  • the liquid flows into dispersant layer 26 which, due to the relatively high capillarity thereof, not only disperses the liquid across the inner surface of absorbent layer 12 but also accelerates the flow of liquid through portion 22.
  • the liquid flows into and is retained in layer 12 until such layer becomes saturated. Thereafter, since resistant layer 16 is substantially liquid-impervious, the liquid flows about the edges of layer 16 into dispersant layer 18 as shown by arrows 30 (FIG. 2). Resistant layer 16 thus prevents the liquid from flowing directly into layer 18 and thereby minimizes the possibility that the liquid will penetrate one portion of pad 10 before all portions of the pad have been wetted. Dispersant layer 18, similarly to layer 26, not only disperses the liquid across the inner surface of absorbent layer 14, including the portion thereof adjacent the outer surface of layer 16, but also prevents the liquid which flows about the edges of layer 16 from passing back through cover portion 22. In this fashion the liquid flows into layer 14 until such layer becomes saturated.
  • pad 10 provides maximum comfort to a user by minimizing liquidbody contact, and maximizes efficient use of the material from which the pad is comprised by ensuring that substantially all portions of the pad become wetted before liquid penetrates any one portion of the pad. Also, due to such flow pattern, pad 10 has a relatively high capacity for retaining fluids.
  • pad 10 After a single use, pad 10 preferably is disposed of. Since the various layers of the pad preferably are disintegratable in water, one sanitary and expedient method of disposing of a used pad is to discard the pad into a toilet. After soaking for a few moments the various layers of the pad will disintegrate and can be flushed into the sewer.
  • pad 10 is ideally suited for use as a disposable diaper, sanitary napkin or medical dressing; the size and shape of the pad being tailored to suit the desired use.
  • An absorbent pad comprising:
  • first and second superposed liquid-absorbent layers the surface of said first absorbent layer facing said second absorbent layer having less area than the surface of said second absorbent layer facing said first absorbent layer; and liquid-resistant layer disposed between said absorbent layers and comprising an air-pervious, substantially liquid-impervious, flexible sheet, the surfaces of said resistant layer facing said absorbent layers each having less area than said second absorbent layer facing surface, said pad being adapted to be worn with said first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer.
  • liquid-absorbent material includes particles of an organic noncellulosic substance selected from the group consisting of blood albumin, egg albumin, starches, pectin, algin, karaya, tragacanth and guar gums, natural and synthetic gums of polysaccharide character, chemically modified starches, and chemically modified natural and synthetic gums of a polysaccharide character.
  • liquid-absorbent material includes fibers of a cellulosic substance.
  • An absorbent pad comprising:
  • first and second superposed liquid-absorbent layers the surface of said first absorbent layer facing said second absorbent layer having less area than the surface of said second absorbent layer facing said first absorbent layer; liquid-resistant layer disposed between said absorbent layers, the surfaces of said resistant layer facing said absorbent layers each having less area than said second absorbent layer facing surface, said pad being adapted to be worn with said first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer; and cover disposed about said first and second absorbent layers, the portion of said cover disposed adjacent said second absorbent layer comprising an air-pervious, substantially liquidnimpervious, flexible sheet.
  • An absorbent pad comprising:
  • first and second superposed liquid-absorbent layers the surface of said first absorbent layer facing said second absorbent layer having less area than the surface of said second absorbent layer facing said first absorbent layer; liquid-resistant layer disposed between said absorbent layers, the surfaces of said resistant layer facing said absorbent layers each having less area than said second absorbent layer facing surface, said pad being adapted to be worn with said first absorbent layer adjacent the body of a user so that liquid flowing into and through the first absorbent layer and contacting the resistant layer will flow about the edges of the resistant layer into the second absorbent layer; cover disposed about said first and second absorbent layers; and a liquid-dispersant layer disposed between said second absorbent and resistant layers, the surfaces of said dispersant layer facing said second absorbent and resistant layers each having approximately the same area and dimensions as said second absorbent layer facing surface so that the dispersant layer will distribute liquid flowing about the edges of the resistant layer across said second absorbent layer facing surface.
  • first-mentioned and second dispersant layers comprise nonwoven sheets of material having a substantially higher capillarity than the material from which said first and second absorbent layers are comprised.

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  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Biomedical Technology (AREA)
  • Epidemiology (AREA)
  • Hematology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
US825247A 1969-05-16 1969-05-16 Multilayer absorbent pad Expired - Lifetime US3595235A (en)

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US82524769A 1969-05-16 1969-05-16
GB2751470 1970-06-08
DE19702029766 DE2029766A1 (de) 1969-05-16 1970-06-16 Mehrschichtiges Saugkissen
FR7028766A FR2102456A5 (enrdf_load_stackoverflow) 1969-05-16 1970-08-04

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DE (1) DE2029766A1 (enrdf_load_stackoverflow)
FR (1) FR2102456A5 (enrdf_load_stackoverflow)
GB (1) GB1295493A (enrdf_load_stackoverflow)

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JPS53155444U (enrdf_load_stackoverflow) * 1977-05-12 1978-12-06
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US3683916A (en) * 1971-01-11 1972-08-15 Frederick K Mesek Disposable diaper
US3916447A (en) * 1972-04-24 1975-11-04 Kimberly Clark Co Low cost, absorbent, clinging, aqueous liquid barrier protective covering
JPS4925648U (enrdf_load_stackoverflow) * 1972-06-12 1974-03-05
US3996936A (en) * 1974-02-15 1976-12-14 Molnlycke Ab Body fluid absorption fiber fabric
US3901238A (en) * 1974-03-18 1975-08-26 Procter & Gamble Disposable diaper having a resin treated absorbent pad to improve integrity, softness and dryness
US4019517A (en) * 1975-07-02 1977-04-26 Glassman Jacob A Disposable diaper
US4022210A (en) * 1975-08-11 1977-05-10 Glassman Jacob A Disposable diaper with a supplemental insert
US4069822A (en) * 1975-10-30 1978-01-24 The Procter & Gamble Company Porous fibrous web to a substrate and articles therefrom
JPS53155444U (enrdf_load_stackoverflow) * 1977-05-12 1978-12-06
FR2444469A1 (fr) * 1978-12-18 1980-07-18 Kendall & Co Pansement chirurgical
US4344999A (en) * 1980-04-22 1982-08-17 W. L. Gore & Associates, Inc. Breathable laminate
US4496358A (en) * 1982-12-13 1985-01-29 Colgate-Palmolive Company Diaper having variable density absorbent pad
US5489283A (en) * 1983-07-05 1996-02-06 The Procter & Gamble Company Shaped sanitary napkin with flaps
US6004893A (en) * 1983-07-05 1999-12-21 The Procter & Gamble Company Shaped sanitary napkin with flaps
US6746435B1 (en) 1983-07-05 2004-06-08 The Procter & Gamble Company Shaped sanitary napkin with flaps
US4687478A (en) * 1984-03-20 1987-08-18 The Procter & Gamble Company Shaped sanitary napkin with flaps
US5267992A (en) * 1984-03-20 1993-12-07 The Procter & Gamble Company Shaped sanitary napkin with flaps
US4578069A (en) * 1984-08-10 1986-03-25 Kimberly-Clark Corporation Breathable baffle composite
EP0252186A1 (en) * 1986-07-07 1988-01-13 Paul Van Malderen Bandage for private hygiene
US4798603A (en) * 1987-10-16 1989-01-17 Kimberly-Clark Corporation Absorbent article having a hydrophobic transport layer
US5364382A (en) * 1989-05-08 1994-11-15 Kimberly-Clark Corporation Absorbent structure having improved fluid surge management and product incorporating same
US5429629A (en) * 1989-05-08 1995-07-04 Kimberly-Clark Corporation Absorbent structure having improved fluid surge management and product incorporating same
US5185009A (en) * 1989-07-10 1993-02-09 Elmo Sitnam Biodegradable diaper
US6316687B1 (en) 1989-10-04 2001-11-13 Kimberly-Clark Worldwide, Inc. Disposable diaper having a humidity transfer region, Breathable zone panel and separation layer
WO1991008726A1 (en) * 1989-12-19 1991-06-27 The Procter & Gamble Company Disposable sanitary garments
EP0506775A4 (enrdf_load_stackoverflow) * 1989-12-19 1994-04-13 The Procter & Gamble Company
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GB1295493A (enrdf_load_stackoverflow) 1972-11-08
FR2102456A5 (enrdf_load_stackoverflow) 1972-04-07
DE2029766A1 (de) 1971-12-23

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