WO1992020311A1 - Articles hygieniques absorbants - Google Patents

Articles hygieniques absorbants Download PDF

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Publication number
WO1992020311A1
WO1992020311A1 PCT/GB1992/000817 GB9200817W WO9220311A1 WO 1992020311 A1 WO1992020311 A1 WO 1992020311A1 GB 9200817 W GB9200817 W GB 9200817W WO 9220311 A1 WO9220311 A1 WO 9220311A1
Authority
WO
WIPO (PCT)
Prior art keywords
absorbent
cover sheet
apertured
core
film
Prior art date
Application number
PCT/GB1992/000817
Other languages
English (en)
Inventor
Adrian John Colbert
Original Assignee
Smith & Nephew Plc
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
Priority claimed from GB919110981A external-priority patent/GB9110981D0/en
Priority claimed from GB919115146A external-priority patent/GB9115146D0/en
Priority claimed from GB919115542A external-priority patent/GB9115542D0/en
Application filed by Smith & Nephew Plc filed Critical Smith & Nephew Plc
Priority to KR1019930701931A priority Critical patent/KR930702937A/ko
Publication of WO1992020311A1 publication Critical patent/WO1992020311A1/fr

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Classifications

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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
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/476—Sanitary towels, incontinence pads or napkins characterised by encircling the crotch region of the undergarment
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    • A61F13/00—Bandages or dressings; Absorbent pads
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    • 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
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    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/475—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means
    • A61F13/4751—Sanitary towels, incontinence pads or napkins characterised by edge leakage prevention means the means preventing fluid flow in a transversal direction
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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
    • A61F13/51—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
    • A61F2013/51078—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 being embossed
    • A—HUMAN NECESSITIES
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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
    • A61F13/51—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
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51121—Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material
    • A61F2013/51126—Topsheet, i.e. the permeable cover or layer facing the skin characterised by the material being nets
    • 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
    • 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
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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
    • A61F2013/530007—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium being made from pulp
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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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
    • 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
    • A61F2013/530343—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
    • A61F2013/530357—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 wool
    • 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
    • A61F2013/530437—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 part with elevated absorption means
    • A61F2013/530445—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 part with elevated absorption means by defining a target or acquisition or vulnerability zone
    • 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
    • A61F2013/530547—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the absorbing medium having superabsorbent materials, i.e. highly absorbent polymer gel materials being only in particular parts or specially arranged positioned in a separate layer or layers
    • 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
    • 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
    • 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
    • A61F13/56—Supporting or fastening means
    • A61F13/58—Adhesive tab fastener elements
    • A61F2013/583—Adhesive tab fastener elements with strips on several places

Definitions

  • the present invention relates to hygienic absorbent devices and in particular relates to devices in the form of sanitary napkins, diapers, incontinence pads and the like.
  • Conventional absorbent devices such as sanitary napkins or towels, diapers, incontinence pads and the like normally comprise an absorbent core and a liquid pervious cover sheet over the body facing side thereof.
  • the cover sheet will make direct contact with the user's skin in use. Any body fluids such as blood, urine and the like will contact the cover sheet before being transmitted therethrough to the absorbent core. It is a common problem with hygienic absorbent devices that in use if pressure is exerted on the device absorbed fluid may be squeezed out of the core and be returned back to the surface of the device thereby re-wetting the cover sheet and hence also the skin of the user.
  • U.K. Patent Specification No. 2225724 discloses an absorbent device comprising an absorbent core, a cover layer and an intermediate layer comprising an apertured, contoured film of an elastomeric polymer material.
  • the production of such contoured apertured intermediate layer suffers from the drawbacks as described above but GB-A-225724 taught that the use of such corrugated materials were necessary to achieve low wet-back and did not suggest that effectively flat materials could be employed.
  • menstrual fluid may be retained on the surface of a cover layer and cause unsightly staining. Entrappment of fluid in the cover sheet interstices, for example between the fibres of a non-woven cover sheet may also cause discomfort for the user.
  • the present invention seeks to ameliorate the disadvantages of the prior art in that the use of contoured, bulky intermediate layers or complex composite layers to assist fluid penetration is avoided by the use of two overlying and adjacent apertured polymer films to cover the absorbent core of an absorbent device such as a disposable napkin.
  • an absorbent device such as a disposable napkin.
  • the absorbent devices of the invention of a simpler construction compared with the prior art but also combine low wet-back properties with a high degree of surface cleanliness. It is particularly surprising that this can be achieved employing a planar film which thereby avoids the disadvantage of corrugated materials of the type described in EP-A-0178108 or GB-A-2225724.
  • the present invention provides an absorbent device having low fluid wet-back comprising an absorbent core, a cover sheet over a body facing side thereof and an intermediate layer between the cover sheet and the core wherein the cover sheet comprises an apertured polymer film and the intermediate layer comprises a planar apertured polymer film.
  • the present invention further provides an absorbent device having low fluid wet-back and a high relative brightness comprising an absorbent core, a body contacting cover sheet on a body facing side of the core, and an intermediate sheet between the core and the cover sheet wherein the cover sheet comprises an apertured polymer film and the intermediate sheet comprises a planar apertured polymer film.
  • a method of producing absorbent devices having low fluid wet-back comprising covering a body facing surface of an absorbent core with a cover sheet and an intermediate layer between the cover sheet and the core wherein the cover sheet comprises an apertured polymer film and the intermediate layer comprises a planar apertured polymer film.
  • the planar apertured films employed in the present invention are substantially flat.
  • the films may contain some surface deformation caused for example during the film forming or aperturing process or for cosmetic decoration. However any surface deformation should be great enough to change the wet-back properties of the film layer from that of a flat film.
  • the hygienic absorbent device of the invention can be a sanitary towel, diaper, dressings, incontinence pad or the like absorbent pad.
  • the device is a sanitary towel. It is in sanitary towels that the benefits of the invention are greatest.
  • the apertures in the apertured polymer films are holes. Such apertures therefore do not include the interstices between the fibres a non-woven fabric cover sheet (that is a sheet of entangled fibres or the like).
  • the apertures in the polymer are provided all over at least the operative part of the device, e.g. at least in the region which overlies the body facing surface of an absorbent device. Aptly apertures are provided over the entire surface of the cover or intermediate layer.
  • an apertured polymer film may be a polymer net.
  • a polymer net as used herein is a polymer sheet having apertures defined by integral strands and junctures formed from the polymer material.
  • the term 'apertured film' as used herein will be understood to include such polymer nets.
  • the absorptive devices of the invention have low fluid wet-back values.
  • the fluid wet-back is the amount of a test fluid which strikes back through to the body contacting surface of the device when the device is subjected to a standard load and the test for determining wet-back is hereinafter described.
  • Devices of the present invention aptly have a fluid wet-back value of less than 0.5 g, suitably not greater than 0.2 g and preferably less than 0.1 g.
  • the absorbent devices of the present invention are further characterised as possessing good surface cleanliness of the body contacting layer and a high resistence to staining by body fluids such as menses.
  • the surface cleanliness properties are defined by the results of a relative optical brightness test which is described hereinafter and in which the optical brightness of a stained area of the body contacting surface of the device is compared with that of an unstained area of the body contacting surface. The closer that the relative optical brightness value is to unity the more stain resistant and clean-looking is the surface of the body contacting layer.
  • the absorbent devices of the present invention will aptly have a relative optical brightness value of greater than 0.65 and suitably greater than 0.75.
  • Preferred devices of the invention will have a relative optical brightness value of at least 0.80.
  • the absorbent devices of the invention consist of two or more apertured films overlying the absorbent core.
  • the absorbent device will therefore comprise a first apertured polymer film overlying a second film which is a planar apertured film and which is between the first film and the absorbent core.
  • first apertured polymer film overlying a second film which is a planar apertured film and which is between the first film and the absorbent core.
  • second film which is a planar apertured film and which is between the first film and the absorbent core.
  • the absorbent devices of the invention consist of two or more apertured films overlying the absorbent core.
  • the absorbent device will therefore comprise a first apertured polymer film overlying a second film which is a planar apertured film and which is between the first film and the absorbent core.
  • more than two apertured films for the body contacting layer may be used. However, this is not normally necessary or desirable except that the use of three film layers may be preferred for absorptive devices which are not generally planar
  • the body contacting layer may comprise an apertured polymer film, overlying a second film which is a planar apertured polymer film and wherein another liquid pervious layer such as a third apertured polymer film, e.g. a polymer net or perforated film or non-woven fabric lies between that liquid pervious layer and the core.
  • a third apertured polymer film e.g. a polymer net or perforated film or non-woven fabric
  • the present invention provides a low wet-back absorptive device having an absorbent pad covered on one surface by an apertured body facing layer comprising a layer of two flexible polymer nets.
  • Each of the apertured films employed in the device of the invention can have an open area which is suitably at least 25%, favourably at least 30% and preferably at least 35% of the area of the total area film.
  • the apertured film can have an open area which is suitably not greater than 90%, favourably not greater than 70% and preferably not greater than 60% and most preferably not greater than 45% of the area of the total areas of the film.
  • a film comprising the cover sheet has an open area greater than the open area of the film comprising an intermediate layer.
  • the intermediate layers for example the second and subsequent apertured polymer films can have an open area which is suitably at least 5%, favourably at least 10% and preferably at least 15% of the area of the cover layer.
  • the intermediate layer can have an open area which is suitably not greater than 25%, favourably not greater than 23% and preferably not greater than 21% of the area of the cover layer.
  • the largest dimension of the apertures in the cover layer of the device of the invention can suitably be at least 0.1mm and can preferably be at least 0.4mm in size.
  • the largest aperture dimension can suitably be not greater than 2mm in size and can preferably be not greater than 1.5mm in size.
  • the apertures in an intermediate layer can aptly be the same size as those of the first apertured film. They may suitably have a largest dimension size of at least 0.1mm and can preferably be at least 0.2mm in size. However the largest dimension size of the apertures in the apertured film need not be greater than 1.0mm in size and can preferably be not greater than 0.8mm in size.
  • the apertures in each of the films of the component layers may have a symmetrical shape such as a square, diamond, circular or triangular shape or an unsymmetrical shape for example, an elongate shape such as rectangular or oval shape.
  • the size of apertures as hereinabove mentioned therefore refer to maximum size dimension of the apertures.
  • the apertures in the films component layers can be formed by any suitable conventional perforating process.
  • Such processes include mechanical perforation using needles or punches, hot melt perforation of selected areas using for example heated protruberances such as heated needles or embossed rollers or hot fluid such as flame or hot gases.
  • Nets may be formed by stretching such perforated films or by stretching a film or sheet embossed with thinner areas.
  • Favoured apertured polymer films in the form of polymer nets comprise an elasto eric polymer and in particular a thermoplastic elastomeric polymer.
  • Such nets of elastomeric polymer can impart 'softness' to the surface of the device of the invention.
  • the cover layer is comprised of such a polymer net.
  • Suitable thermoplastic elastomeric polymers include polyether ester and polyether-polya ide block copolymers, polyurethanes, styrene-butadiene and styrene-isoprene block copolymers, polyisobutadiene and ethylene-vinyl acetate copolymers.
  • Nets for use in the invention may comprise a blend of elastomeric polymer such as ethylene vinyl acetate copolymer with a compatible polymer or an incompatible polymer such as polyolefine, for example low density polyethylene or polystyrene.
  • elastomeric polymer such as ethylene vinyl acetate copolymer
  • compatible polymer such as polyethylene vinyl acetate copolymer
  • incompatible polymer such as polyolefine, for example low density polyethylene or polystyrene.
  • Suitable nets for use in the invention which comprise a blend of ethylene vinyl acetate and an incompatible polymer are disclosed in European Patent No. 141592.
  • a favoured material for the nets used in the invention is a blend of an ethylene-vinyl acetate copolymers (EVA) preferably in amounts of at least 10% by weight and an incompatible polymer preferably in amounts of at least 10% by weight such as a polyolefin.
  • EVA ethylene-vinyl acetate copolymers
  • suitable polyolefins include polystyrene and polyethylenes such as low density and linear low density polyethylenes.
  • a particularly preferred material is a blend of from 10 to 90 parts by weight of ethylene-vinyl acetate copolymer and 90 to 10 parts by weight of polyolefin and more preferably 20 to 80 parts by weight of ethylene-vinyl acetate copolymer and 80 to 20 parts by weight of polystyrene.
  • Typical examples of such a blend comprises a blend of 40 parts ethylene-vinyl acetate copolymer and 60 parts high impact polystyrene, or a blend about 25 parts ethylene-vinyl acetate copolymer, about 13 parts high impact polystyrene and about 60 parts linear low density polyethylene.
  • nets for use in the invention, and which may aptly be employed for an intermediate layer may comprise a blend of a polyolefine and an incompatible polymer. Such nets are described in U.K. Patent Nos. 914489, 1055963, 1110057 and 1548865. Suitable nets of this type are formed from a blend of polyethylene and high impact polystyrene. Such are available from Smith & Nephew Plastics Ltd. under the Trade Mark Net 909 grades A4, A7, H6C and DHM.
  • a net for use in the device of the invention can have a weight per unit area which is suitably at least 5gm -2 and which is preferably at least lOgm -2 .
  • the net can have weight per unit area which is suitably not greater than 50gm -2 and which is preferably not greater than 40g ⁇ r 2 .
  • Such a net can have a thickness which is suitably at least 25 ra and which is preferably at least 50/m.
  • the net can have thickness which is suitably not greater than 300 m and which is preferably not greater than 150 m. The thickness of the net is determined by measuring across the thickest part of the net, ie. the strand or boss.
  • High density polyethylene nets aptly have a thickness of from 100 to 150 m whereas softer nets such as those made from high density polystyrene and EVA polymer blends may have thicknesses of from 75 to lOO ⁇ m.
  • Preferred nets for use in the invention have weight per unit area of 10 to 40gm ⁇ 2 and a thickness of 50 to 150 m.
  • Apt nets comprising high density polystyrene and EVA are known as Net 2000 Ref. Nos. LET6H27, LETH35, LE6H30, LE7H20, LE7625 and LE7630 marketed by Smith & Nephew Plastics Ltd.
  • planar apertured films such as perforated polymer films for use in the invention alone or in addition to net layers can comprise any suitable water insoluble non-toxic pharmaceutical acceptable polymer.
  • Such polymers may be relatively inelastic so that the apertures in the film are not enlarged by stretching of the device caused, for example, by movement of the wearer.
  • Favoured polymers include polyolefins such as polypropylene or high density polyethylene, polyamides, unplasticised polyvinyl chloride and polyesters such as polyethylene terephthalate.
  • the apertured film should have a thickness which is sufficient to prevent it tearing but which low enough to render the film flexible.
  • An apertured film for use in the invention can have a thickness which is suitably at least 6 ⁇ and which is preferably at least 10//m.
  • the apertured film can have a thickness which is suitably not greater than 0.075 / /m and which is preferably not greater than 50 m.
  • Favoured apertured films used in the invention have a thickness of 6 to SO ⁇ ra. and preferably a thickness of 10 to 30 m.
  • Apt planar perforated films for use in the invention comprise polyethylene terephthalate have thickness of 10 to 15/t/m and have preferably been perforated by flaming.
  • Other perforated films such as those formed from polyethylene, e.g. those known as Breadwrap film reference No. 20/330 available from Bakery Packaging Service Ltd may also be used.
  • Such apertured films include those having a construction similar to that described for the top sheets disclosed in U.K. Patent Specification No. 1526778 and similar mateials, for example apertured polymeric films such as described in GB-A-1571922, EP-A-18684, EP-A-39973 and EP-A-40447.
  • At least one of the apertured film layers contains a surfactant as this results in the best level of desirable properties herein described.
  • This may be in the body contacting layer or in an intermediate layer. More aptly both or each of the component layers will contain a surfactant. This leads to particularly good relative optical brightness values.
  • the presence of the surfactant also serves to increase the transmission of body fluids through the layer.
  • the absorbent contacting layer will contain surfactant.
  • the surfactant may be applied directly onto the surface of the component net or film layer, for example as a layer or coating, or integrated into the film during the production thereof.
  • the surfactant may be compounded into the component precursors prior to the base film forming and aperturing processes or, alternatively applied during the net forming process, for example by coextruding the surfactant with the film - or film forming components.
  • a surfactant may be employed in amounts up to 10% by weight of the net or film, more suitably in amounts upto 5% by weight, for example about 1% by weight.
  • Apt surfactants for use in the present invention include: polymeric additives such as polydimethyl siloxane, mixed polymers such as polydimethylsiloxane-polypropylene glycol, polyethylene glycol terpolymer and block copolymers, such as the ethylene oxide-propylene oxide-propylene glycol condensates sold under the trade name PLURONIC eg.
  • PLURONIC L103 metallic salts of fatty acids such as calcium stearate; fatty esters such as glyceryl monostearate and glycerol stearate; fatty ethers such as polyoxyethylene lauryl ether, sold under the trade name BRIJ 35 and fatty amides such as lauric diethanolamide.
  • a preferred surfactant for use in the invention is lauric diethanolamide sold under the trade name LANKROSTAT JP.
  • the polymer material may include up to 10% of fillers or whitening agents such as titanium dioxide.
  • the absorbent material used in an absorbent core of the invention can be any of absorbent materials used in conventional hygienic absorbent pads.
  • Suitable absorbent materials include cellulosic fibres such as commercial fluffed wood pulp, cotton fibres, viscose rayon fibres, and super absorbent material such as grafted cellulose and hydrophilic polymers.
  • the absorbent material however may be blended a minor proportion of hydrophobic fibres such as polyolefine fibres or polyester fibres.
  • the absorbent material in the core can be surrounded or enveloped by a tissue to consolidate the material in the core.
  • the cover layer will cover at least the effective central area of the body facing side of the core and will normally cover the whole of the body facing side thereof.
  • a cover layer surrounds the absorbent core and extends beyond the ends thereof.
  • Such a cover sheet can be sealed at an overlap at the non-body facing side and also adjacent to the ends thereof so that it forms an envelope around the core.
  • a hygienic absorbent device of the invention can optionally but preferably have a liquid impermeable barrier such as polymer film for example polyethylene film over the non-body facing side of the core to inhibit leakage of body fluid or exudate through the back or non-body facing side of the device.
  • the liquid impervious barrier layer may also extend around the sides of the absorbent core to inhibit leakage of fluid therefrom.
  • the barrier layer is situated within the envelope.
  • a barrier film and the non-body facing side of the absorbent core can be attached to the cover sheet on the body facing side thereof by means of a peripheral seal formed for example by heat sealing or adhesive to enclose the absorbent core.
  • Absorbent devices of the invention in particular a sanitary towel may optionally have adhesive for example in the form of strips on the non-body facing surface to allow attachment of the device to a supporting garment.
  • the apertured layer may cover only the body facing surface of the absorbent.
  • the apertured films may be separate from or attached to a barrier layer which covers the garment facing surface and, preferably, two sides of the core.
  • the planar apertured films can also surround the absorbent core.
  • An absorbent fleece layer may be inserted between the apertured layer and the absorbent core to further promote absorption of fluid through the film.
  • the net layers may be attached to each other and/or the absorbent core by, for example, a liquid permeable adhesive or by point bonding, e.g. by the use of ultra sound or the thermal energy.
  • the absorbent devices of the invention may be generally rectangular in shape with a generally flat body facing surface.
  • Preferred forms of generally rectangular absorbent devices have a small caliper, i.e. are thin. Such forms may have caliper or thickness of less than 5mm.
  • thin devices may be employed with cores containing a super absorber and may be used as a pant liner.
  • the absorbent device may have a profiled body facing surface formed by increasing the thickness of the device in certain regions, for example the central region.
  • One or more of the component layers may be extended beyond the sides of the device to provide wings or flaps which will extend around the crotch of the garment and be adapted to be secured to a non-body contacting surface of the garment for example by adhesive tabs.
  • wings or tabs made of suitable material, may be affixed to the absorbent device.
  • the devices of the present invention are particularly useful in this form of 'winged towels' .
  • the devices of the invention will have a relative wet-back value of less than half that of a similar device having only one layer of net, when both devices are tested under identical conditions.
  • the devices of the invention will have a relative wet-back value of at least 10, suitably at least 25, preferably at least 50, more preferably at least 100.
  • the composite film layers used in the invention are capable of providing a device such as a sanitary towel of the invention with relatively low absolute "wet-back" values whilst maintaining adequate fluid absorption rates.
  • the absolute 'wet-back' i.e. the fluid wet-back as meant in claims
  • the tests for determining the relative and absolute wet-back values are referred to as the Fluid Wet Back Tests and are described hereinafter.
  • the films and nets used in the device of the invention may be planar and therefore much simpler to manufacture than the contoured intermediate layers of prior art devices.
  • the net will not normally be contoured the body facing surface may optionally be embossed with a shallow pattern such as repeat flower pattern to provide, for example, a decorative affect.
  • Figure 1 is a cross-section of a sanitary towel of the invention.
  • Figure 2 is a similar cross-section of another sanitary towel of the invention.
  • Figure 3 is a plan view of an apertured layer employed in the present invention.
  • Figure 4 is a fragmentary schematic cross-section of a 'winged' sanitary towel of the invention.
  • Figure 1 shows a sanitary towel 1 of the invention having a first net 2 which encloses absorbent core 3 to form an overlap at the non-body facing surface of core 3.
  • Sanitary towel 1 has net 4 covering the body facing surface of core 3 located between net 2 and core 3.
  • Towel 1 as shown in Figure 1 also has a barrier film 5 covering the non-body facing surface of core 3 with side portions 6 thereof covering the side edges of core 3 to inhibit fluid leakage from towel 1 and adhesive strips 7 covered by release protectors 8 located on an overlap portion of cover sheet 2 to attach towel 1 to a garment.
  • Figure 2 shows another sanitary towel 9 of the invention similar to that of Figure 1 in which intermediate planar net 10 encloses core 3.
  • Figure 3 illustrates two nets formed from films as hereinbefore defined.
  • the first film or net layer 2 has a diamond pattern shape whereas the underlying film or net 4 has a square pattern.
  • both films have apertures of approximately equal size it will be seen that the area of the aperture formed from the film apertures is much less than either of the areas of the apertures of the respective film.
  • the absorbent device consist of a central region 11 and a side flap or wing 12.
  • the absorbent core formed in the central region consists of a non-woven fabric or tissue layer 13 of an upper and lower pulp bats 14 and 15 respectively.
  • the lower bat contains particles of a super absorber material 16.
  • Overlying the central core are an intermediate net 17 and a net cover sheet 18.
  • the wing section 12 is formed of a non-woven fabric 19 bonded to an extension of an impervious backing layer 20, for example formed from a polyethylene film.
  • the liquid pervious layer is bonded to the central region and using components by, for example a hot melt adhesive 21.
  • the absorbent device may be affixed to a garment by adhesive strips 22 after removal of the protector tabs 23.
  • a medium size (25cm x 6.5cm) planar elongate sanitary towel with rounded ends and a construction similar to that of Figure 1 was formed a conventional towel forming process.
  • the towel had an absorbent core (22cm x 6.5cm) of tissue wrapped wood pulp (weight 9g) enclosed within a cover sheet of polymer net.
  • the cover sheet had an overlap on the non-body facing side of the absorbent core and also extended beyond the ends thereof where it was peripherally heat sealed.
  • the towel had an apertured perforated film located between the core and the cover sheet and covering the body facing surface of the core.
  • the towel had a barrier film (20 m thick polyethylene film) located between the core and the sheet which covered the non-body facing surface and side edges of the core and four narrow strips of pressure sensitive adhesive located centrally on the overlap of the cover sheet which were covered by a removable protector sheet.
  • the strips of adhesive were applied in a fluid state (hot melt) to the cover sheet so that strip impregnated and sealed overlap.
  • the polymer net used for the cover sheet was Net 2000 Ref. LET6H27 available from Smith & Nephew Plastics Ltd.
  • the net had an open area in the region of 40% provided by a plurality of oval holes having an average size of 0.9mm x 0.7mm.
  • the apertured film used for the intermediate layer was a perforated polyethylene terephthalate film (12/m thick) with an open area in the region of 19% provided by a plurality of oval holes having an average size of 0.5mm x 0.3mm.
  • This test measures the amount of fluid that is forced out of an absorbent device when a force of lOkPa (kilopascals) is applied to the centre of the test area.
  • Sanitary towels prepared according to Example 1 were subjected to a fluid wet-back test which is designed of devices having a width of at least 5.0cm and was carried out in the following manner.
  • a 2.375Kg flat weight (diameter - 5.5cm) was placed on the napkin and allowed to remain in place for 2 minutes and then removed.
  • 5ml of 1% saline solution coloured with lissamine green dye was delivered onto the centre of the body facing surface of the absorptive device by means of a syringe pump at a rate of Iml/min and at a height of 1cm above the surface.
  • the towel was then left to condition for 30 seconds.
  • a pre-weighed stack of filter papers were then placed over the wetted area of the towel and the weight placed on the filter papers.
  • filter papers are used having a mass weight of from 80-100gm/m , typically about 90gm/m 2 , a thickness of from 158-212t/m @ 53KPa, typically about 185/t/m; an air porosity (GURLEY) of from 5-13 sec (300ml ⁇ /in 2 ) , typically about 9 sec; dry and wet burst pressures of at least 5.0 and 15.0 psi respectively and a water absorbency of about 15mg/cm 2 .
  • Suitable filter papers for use in determing absolute wet-back are those sold under the trade name Whatman No. 54. The number of filter papers used should be sufficient such that top paper is not stained by the dye. After 1 minute, the filter papers were removed and weighed. The wet-back expressed as grams of fluid was then calculated from the difference in weight of the filter papers before and after compression against the absorbent device. The results are the average of tests in five samples.
  • This test prepares the brightness of a area of surface to which fluid has been applied with that of an area to which no fluid has been applied, utilising a Lovibond Tintometer available from The Tintometer Ltd, Salisbury, England.
  • the relative optical brightness is determined from the following calculation.
  • the device to be tested is conditioned for two minutes with a 1.17kg (14cm x 4.7cm) weight placed centrally on it.
  • test article is then left for a period of one minute for the fluid to settle.
  • a visual brightness test of the non-wetted area of the device is made using the Tintometer.
  • a non-wetted area % brightness is obtained from the instrument dial reading of the Tintometer and then calculated from the 'Brightness reading to visual density graph which is then converted to % Brightness using the table for converting visual density to % Brightness and as described by Lovibond using the zero at 50 scale.
  • the wetted area has two readings, the first a visual brightness dial reading a visual density reading is then obtained and added to the calculated figure from the Lovibond scale calculation, i.e.; from the renotated Lovibond colour scale.
  • the two figures, when added together, are then converted to % Brightness using the table for converting visual density to % Brightness.
  • the preferred graph for the conversion of the red colour source is from the Yellow at zero, and using the red value.
  • Sanitary towels prepared according to Example 1 were tested in comparison with two conventional commercially available sanitary towels (Cl , C2) which had a similar construction to that of Example 1 except that the towels had no intermediate apertured layer and the cover sheet thereof was made of a hydrophobic fibrous non-woven fabric and (C3) an absorbent device having only one net layer over the core.
  • test results show that the sanitary towels of the invention exhibit a much lower wet back value than that of conventional commercially available sanitary towels.
  • a base polymer comprising 25 parts by weight of an ethylene-vinyl acetate copolymer (18% vinyl acetate), 59 parts by weight linear low density polyethylene, 13 parts by weight high impact polystyrene and 3% by weight titanium dioxide was divided into two portions and one portion blended with 0.6% by weight lauric diethanol amide surfactant.
  • Each of the final blends were used to make two nets, having square and diamond shaped apertures, respectively, by - extruding the blend through an embossing roller, heating and stretching the embossed film.
  • the apertures of the net having diamond shaped apertures were 0.66mm long by 0.35mm wide whereas the apertures of the net having square shaped apertures were 0.6mm square.
  • the following abbreviations will be used for the nets:
  • An hygienic absorbent device in the form of a sanitary towel was made as follows in which the body contacting apertured layer in accordance with the invention is formed of two nets wherein the body contacting net is termed the 'upper net'.
  • the apertured layer comprises a single apertured net.
  • an absorbent core (216mm long by 60mm wide) of comminuted fluff pulp and having a central layer insert of folded tissue wadding in place centrally into the lower net of the absorbent layer.
  • a liquid impervious film of polyethylene was then placed over the other side of the absorbent core and heat sealed around its edges to the upper net so that the lower net and the absorbent core are sandwiched between the bonding film and upper net.
  • a portion of the exposed surface of the polyethylene backing film is provided with a pressure sensitive adhesive layer, covered by a release paper, to enable the towel to be secured to a garment.
  • a surfactant treated net was produced by co-extruding two polymer blends to form an embossed film which is then heated and stretched to form a net in which the surfactant is present on one of the surfaces.
  • the apertures were diamond-shaped, 0.56mm long by 0.38mm and the net mass weight was 30gm/m 2 .
  • composition of the two polymer blends were: (i) Linear Low Density Polyethylene 60 parts by weig Ethylene Vinyl Acetate (18% VA) Copolymer 24 parts by weig High impact Polystyrene 12 parts by weig Titanium Dioxide 6 parts by weig
  • a 'shaped' towel was produced as described in Examples 2-6 except that the absorbent core was shaped such that the central region was thicker than either the ends or the sides thereof and the non-body facing surface of the absorbent was substantially planar.
  • the apertured body contacting layer was formed of three component nets. The wet-back volumes for nets of this construction are given in the following table: Example Upper Net Intermediate Net Lower Net Wet Back
  • the relative optical brightness for the towels were 0.90 and 0.91, respectively.
  • Sanitary towels were produced in accordance with the procedure described under Examples 2-7 using ethylene-vinly acetate copolymer/linear low density polyethylene/high input polystyrene nets (DT) in combination with as an aperture film the top of the material described as a top sheet in U.K. Patent No. 1526778 and designated PI.
  • DT ethylene-vinly acetate copolymer/linear low density polyethylene/high input polystyrene nets
  • Winged sanitary towels were produced having the construction shown in Figure 4 and in accordance with the procedure and materials described for examples 2 to 7.
  • Example 17 incorporated a diamond upper untreated net together with a surfactant treated lower square net whilst, in the control sample, the lower square net was omitted from the construction.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (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)
  • Dermatology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Hematology (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Abstract

On décrit un article absorbant (1) présentant un faible taux de refoulement de fluide et une bonne propreté de surface ainsi qu'une bonne résistance aux taches, et qui se compose d'un élément central absorbant (3), d'une feuille de couverture (2) placée sur le côté tourné vers le corps, et d'une couche intermédiaire (4) située entre la feuille de couverture et l'élément central, la feuille de couverture comprenant un film polymère ajouré, tel qu'un filet polymère souple, et la couche intermédiaire comprenant un film polymère plat ajouré tel qu'un filet polymère souple.
PCT/GB1992/000817 1991-05-21 1992-05-05 Articles hygieniques absorbants WO1992020311A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930701931A KR930702937A (ko) 1991-05-21 1992-05-05 위생 흡수 제품

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
GB9110981.9 1991-05-21
GB919110981A GB9110981D0 (en) 1991-05-21 1991-05-21 Hygienic absorbent devices
GB919115146A GB9115146D0 (en) 1991-07-13 1991-07-13 Hygienic absorbent devices
GB9115146.4 1991-07-13
GB9115542.4 1991-07-18
GB919115542A GB9115542D0 (en) 1991-07-18 1991-07-18 Hygienic absorbent devices
GBPCT/GB92/00707 1992-04-16

Publications (1)

Publication Number Publication Date
WO1992020311A1 true WO1992020311A1 (fr) 1992-11-26

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0934737A1 (fr) * 1998-02-05 1999-08-11 The Procter & Gamble Company Couche supérieure avec des moyens de masquage pour des articles absorbants
CN116492497A (zh) * 2023-05-09 2023-07-28 温学辉 一种抗创面粘连、抗碳屑脱落的活性碳纤维组织物结构

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1610508A1 (de) * 1967-09-30 1971-05-27 Bard Inc C R Gegenstand zum Adsorbieren von Fluessigkeiten
EP0040084A2 (fr) * 1980-05-12 1981-11-18 THE PROCTER & GAMBLE COMPANY Article à jeter absorbant avec une couche intermédiaire entre la couche de recouvrement et le coeur absorbant
US4519798A (en) * 1982-08-25 1985-05-28 Ethyl Corporation Absorptive structure
EP0178108A2 (fr) * 1984-10-02 1986-04-16 SMITH & NEPHEW plc Couche absorbante hygiènique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1610508A1 (de) * 1967-09-30 1971-05-27 Bard Inc C R Gegenstand zum Adsorbieren von Fluessigkeiten
EP0040084A2 (fr) * 1980-05-12 1981-11-18 THE PROCTER & GAMBLE COMPANY Article à jeter absorbant avec une couche intermédiaire entre la couche de recouvrement et le coeur absorbant
US4519798A (en) * 1982-08-25 1985-05-28 Ethyl Corporation Absorptive structure
EP0178108A2 (fr) * 1984-10-02 1986-04-16 SMITH & NEPHEW plc Couche absorbante hygiènique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0934737A1 (fr) * 1998-02-05 1999-08-11 The Procter & Gamble Company Couche supérieure avec des moyens de masquage pour des articles absorbants
WO1999039671A1 (fr) * 1998-02-05 1999-08-12 The Procter & Gamble Company Article absorbant comprenant une feuille superieure dotee de pouvoirs de masquage
CN116492497A (zh) * 2023-05-09 2023-07-28 温学辉 一种抗创面粘连、抗碳屑脱落的活性碳纤维组织物结构

Also Published As

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