GB2085305A - Absorbent products - Google Patents

Absorbent products Download PDF

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Publication number
GB2085305A
GB2085305A GB8131733A GB8131733A GB2085305A GB 2085305 A GB2085305 A GB 2085305A GB 8131733 A GB8131733 A GB 8131733A GB 8131733 A GB8131733 A GB 8131733A GB 2085305 A GB2085305 A GB 2085305A
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GB
United Kingdom
Prior art keywords
film
product according
absorbent material
plastics film
absorbent product
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB8131733A
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GB2085305B (en
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Johnson and Johnson
Original Assignee
Johnson and Johnson
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Filing date
Publication date
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Priority to GB8131733A priority Critical patent/GB2085305B/en
Publication of GB2085305A publication Critical patent/GB2085305A/en
Application granted granted Critical
Publication of GB2085305B publication Critical patent/GB2085305B/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—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
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B46/00—Surgical drapes
    • A61B46/40—Drape material, e.g. laminates; Manufacture thereof
    • 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
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0203—Adhesive bandages or dressings with fluid retention members
    • 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
    • A61F13/511—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
    • 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
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/513—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its function or properties, e.g. stretchability, breathability, rewet, visual effect; having areas of different permeability
    • 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
    • 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
    • A61F2013/00089—Wound bandages
    • A61F2013/00246—Wound bandages in a special way pervious to air or vapours
    • A61F2013/00251—Wound bandages in a special way pervious to air or vapours with macroscopic openings
    • 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
    • A61F2013/0074—Plasters means for wound humidity control with absorbing pads containing foams
    • 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
    • A61F2013/00855—Plasters pervious to air or vapours
    • A61F2013/00859—Plasters pervious to air or vapours with macroscopic openings
    • 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
    • A61F2013/15008—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use
    • A61F2013/15048—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterized by the use for protection against contamination, or protection in using body disinfecting wipes
    • 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
    • A61F2013/530802—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 characterized by the foam or sponge other than superabsorbent
    • 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

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Epidemiology (AREA)
  • Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Materials For Medical Uses (AREA)

Abstract

Absorbent products such as plasters and bandages, surgical wound dressings, female sanitary protection products, baby napkins, e.g. disposable napkins, and incontinence products comprise an absorbent material, at least partially faced by a cellular plastics film, preferably a polyolefin film, e.g. polyethylene film, having perforations which have been produced by passing electrical discharges therethrough. The absorbent material may be entirely embraced by the cellular plastics film, or one face of the absorbent material may be covered by the cellular plastics film and another face optionally covered by a backing sheet. Also disclosed is the use of the perforated film in drapes and gowns for surgical and other use, and in filtering media, including face masks.

Description

SPECIFICATION Absorbent products The present invention relates to absorbent products of the kind comprising absorbent material and a porous facing material, for example, plasters and bandages, surgical wound dressings, female sanitary protection products, baby napkins, e.g. disposable napkins and incontinence products.
According to the present invention there is provided an absorbent product comprising an absorbent material at least partially faced by a cellular plastics film having perforations which have been produced by passing electrical discharges therethrough. In one aspect of the invention, the absorbent material is entirely embraced by said cellular plastics film. In another aspect of the present invention, one face of the absorbent material is covered by said cellular plastics film and another face is optionally covered by a backing sheet.
A suitable cellular plastics film is described in U.K. Patent Specification No. 1556614 and is a thermoplastic p olymeric film in which voids or cells are generated by one or more of a variety of means including i) the use of physical or chemical blowing agents; ii) the physical deformation of materials containing additives other than blowing agents which cause the material to be void-containing on physical deformation, which additives may, for example, be inorganic or organic fillers or pigments and iii) the leaching out of soluble additives.
Preferably the film is as described and claimed in U.K. Patent Specification No. 1525224. This is a stretched polyolefin film having a substantially uniform cellular structure and formed from a composition comprising a crystalline linear polyolefin, which film has at least the following characteristics:: 1) it comprises no more than 14% by volume of the film of closed cells; 2) it has an apparent density which is 90 to 20% of the density of the non-cellular unstretched composition; 3) it has a cell factor equal to or less than +0.65, which factor may be zero or negative; 4) it contains from 0 to 25% by weight based on the polyolefin of a filler and/or pigment; 5) it has a thickness of up to 11 mils;(thousandths of inch) 6) it comprises cells with dimensions such that the average cell volume is no greater than 10#4cc; 7) it has been stretched in the plane of the film by an amount corresponding to a stretch ratio of at least 1.1:1 in one direction or in two substantially mutually perpendicular directions.
The mode of calculation of the percentage volume of closed cells, the apparent density, the cell factor, film thickness and average cell volume are described in the U.K. Specification 1525224.
The film is preferably a foamed high density polyethylene film having a weight range of 10 to 100, preferably 10 to 50 g/m2 and preferably containing from 10 to 80 perforations/cm2. Foamed high density polyethylene film sold under the trade name "Aerowrap" by B.X.L. Plastics Limited having a weight of about 12 or 16 g/m2 and 40 perforations /cm2 has been found particularly useful. The foam cell structure reduces the springiness of the film so that it folds and retains the folds well in the machine make up of the absorbent products.
The perforations may be made by the discharge method disclosed in German Offenlegunsschrift No.
2552919. This produces a spread of sizes for the perforations due to the cellular nature of the film. The range of sizes is normally between approximately 100 microns in diameter and 800 microns with preferably at least 30% of the perforations having sizes between 300 microns and 600 microns. The spark discharge perforations are preferentially formed at the voids and thin walled cells of the foam structure and thereby the perforations are neatly formed with a minimum of thermal degradation or melt displacement and with melt-smooth edges which are virtually inconspicuous and non-abrasive as they contain a minimum of displaced plastics material. The small smooth edged perforations gives good drainage of fluids into the absorbent material, whilst providing good encapsulation of the absorbent material.It has been found that this material has non-adherent wound release properties, allows the passage of blood and water through the perforations, is soft, smooth, flexible and non-abrasive, conforms wells and is not harsh or rigid in contact with the skin or wounds and is strong with good resistance to tear initiation and propagation. Also compared to previously used materials, the relative freedom from surface roughness, large holes, and perforations containing polymer webs, reduces the chance of amalgamation of the dressing to a scab or developing wound repair tissue.
It is also believed that the electrical discharge method of perforation assists in providing the permeability properties of the cellular plastics film required in absorbent products and its effect is somewhat similar to the corona electrical discharge process used to promote ink adhesion on plastics film which are to be printed.
The effect of the electrical discharge is that one side of the film is lightly pitted and oxidized by the discharge and ionisation, and that surface tension is modified and the contact angle reduced. Drops of water, for example, applied to such side of the film will spread and hence penetrate the film more easily than on the other side on which water remains as discrete drops.
Accordingly the cellular film enhances passage of liquid in the direction towards the untreated side of the film. When the film is used in products, such as baby napkins, where a large volume of liquid needs to be rapidly distributed and absorbed over a large area, it is preferred that the pitted an oxidized side of the film be exposed to the liquid to be absorbed.
However when the film is used in wound dressings, it is preferred that the untreated side of the film be exposed to the blood or wound exudate to be absorbed. The blood or wound exudate is generally small in volume and more viscous and moves more slowly through the perforations. However on meeting the pitted and oxidized side of the film, the blood or wound exudate is assisted to disperse and becomes more uniformly distributed in the absorbent. It is also known that the untreated side of the film has lower adhesion to, and better release from the wound repair tissue.
The following Figures 1 to 9 illustrate a number of absorbent products according to the present invention in which the perforations in the perforated cellular film have been produced by electrical dicharges.
In the drawings, the same reference numerals indicate the same or similar parts.
Figure 1 shows a cross-section through an adhesive plaster or bandage; Figure 2 is a plan view of Figure 1; Figures 3 to 6 show cross-sections of various surgical wound dressings; Figures 7 and 8 show cross-sections of female sanitary protection products; and Figure 9 shows a cross-section of a baby napkin.
Referring to Figures 1 and 2 there is shown an adhesive plaster or bandage comprising a backing sheet 3 having a layer of pressure sensitive adhesive 4thereon. A layer, such as a pad, of absorbent material 2 is entirely embraced by a perforated cellular plastics film 1. In use, the plaster is placed over the wound with the perforated film 1 in contact with the wound.
Preferably the cellular plastics film is of the foamed type such as described and claimed in British Patent Specification No. 1525224 or described in British Patent Specification No.1556614, and is preferably a foamed high density polyethylene film having a weight range of 10 to 100, preferably 10 to 50, g/m2 and preferably containing from 10 to 80 perforations /cm2. Foamed high density polyethylene film sold under the trade name "Aerowrap" by B.X.L. Plastics Limited having a weight of about 12 or 16 g/m2 and 40 perforations /cm2 has been found particularly useful.
Referring to Figures 3 to 6 there are shown various surgical wound dressings. In Figure 3, a pad of absorbent material 2 (such as cotton or rayon fibres) is embraced by a sheet of perforated cellular plastics film 1 having its ends joined by adhesive 6. Within absorbent material 2 are two layers of semi-repellent tissue 5. In Figure 4, absorbent material 2 is covered on one face by a perforated portion 1 and on the other face by a non-perforated portion or backing sheet portion 7 of a sheet of plastics film. Again the ends of plastics film are joined by adhesive 6 and within absorbent material 2 are two layers of semi-repellenttissue 5. In Figures 5 and 6 perforated plastics film is mounted over one face of absorbent material 2 by lines of adhesive 8.The absorbent material 2 may be foam (as in Figure 5) or needle-loomed orfelted cotton or rayon (as in Figure 6). In use, the wound dressings described in Figures 3 to 6 are placed on the wound with the perforated cellular film in contact with the wound.
In Figure 7, the pad of absorbent material 2, such as woodpulp, is partially embraced by a plastics film 10 for retaining absorbed fluid. The absorbent material 2 and plastics film 10 is wholly embraced by a layer of tissue 9 which in turn is embraced by a perforated plastics film 1. The ends of the tissue and the ends of the film 1 overlap as shown and are secured by known means. An attachment layer of pressure sensitive adhesive 11 is secured to the underside of the perforated plastics film 1 and a layer of silicone coated release paper 12 protects the adhesive before use.
In Figure 8, a layer pad of adsorbent material 2, such as woodpulp is wholly embraced by a layer of tissue 9. The tissue layer 9 is covered on one face by a perforated portion of plastics film 1, and on the opposite face by a non-perforated portion, or backing sheet portion 7 of said film 1. An attachment layer strip of pressure sensitive adhesive 11 is secured to the underside of the backing sheet portion 7, and a layer of silicone release paper 12 protects the adhesive before use. In use the female sanitary protection products of Figures 7 and 8 are secured to panties by means of adhesive 11.
In Figure 9, a pad or absorbent material 2, such as woodpulp, is wholly embraced by tissue 9 which in turn is embraced by perforated plastics film 1. The perforated plastics film 1 is attached to a non-perforated plastics backing sheet 14 by means of adhesive 13.
The present invention also relates to the use of electrical discharge perforated cellular plastics films (particularly as claimed and described in British Patents Nos. 1515224 or 1556614) for surgical drapes and gowns, and disposable protective clothing.
The present invention also relates to the use of electrical discharge perforated cellular plastics films (particularly as claimed and described in British Patents Nos. 1525224 or 1556614) for filtrations media, such as face masks. The film can be used in a mask of the type in which a fibrous layer is embraced between two outer support layers of film. Furthermoe it has been found possible to provide a face mask from a number of superimposed layers of the perforated film, e.g. four superimposed perforated layers of 16 g/m2 film. It is believed that it is possible to breath through a plurality of layers of this film because the irregular foamed surfaces provide air channels between film layers. Such a face mask is low in cost an is particularly useful in coarse dust atmospheres.
As mentioned hereinbefore, the electrical discharge method of perforation enhances passage of liquid in the direction towards the untreated side of the film. This property is essential in films used as nappy liners.
Accordingly the invention also comprehends the use, as a nappy liner, of electrical discharge perforated cellular film (particularly as claimed and described in British Patents Specifications No. 1525224 or 1556614).
In use, the nappy liner is inserted between the baby's body and the nappy.
The present invention also relates to the use of electrical discharge perforated cellular plastics films (particularly as claimed and described in British Patents Nos.1515224or 1556614) for hospital disposable examination drapes and gowns. The air and moisture vapour permeability properties conferred on the cellular film by the perforations permit draps and gowns to be fabricated which are comfortable to wear since the normal skin transpiration functions are not impeded. The non-reflected light glare and non-transparent modesty characteristics required in drapes and gowns are conferred by the light diffusion properties of the irregularcellularfilm surface butthese characteristics are preferably enhanced by the incorporating opacifying fillers and/or pigments into the plastic matrix from which the cellular film is originally produced.
The present invention also relates to the use of electrical discharge perforated plastics film (particularly as claimed and described in British Patents Nos. 1515224 or 1556614) in incontinence products.

Claims (29)

1. An absorbent product comprising an absorbent material at least partially faced by a cellular plastics film having perforations which have been produced by passing electrical discharges therethrough.
2. An absorbent product according to claim 1 wherein said absorbent material is entirely embraced by said cellular plastics film.
3. An absorbent product according to claim. 1 wherein one face of said absorbent material is covered by said cellular plastics film and another face is optionally covered by a backing sheet.
4. An absorbent product according to claim 1 or 2 comprising a backing sheet having a layer of pressure sensitive adhesive thereon, and a layer of absorbent material entirely embraced by a perforated cellular plastics film on said pressure sensitive adhesive.
5. An absorbent product according to claim 1 or 2 comprising a layer of absorbent material embraced by a sheet of perforated cellular plastics film, said absorbent material having therein two layers of semi-repellent tissue.
6. An absorbent product according to claim 1 or 3 comprising a layer of absorbent material covered on one face by a perforated portion and on the other face by a non-perforated portion of a sheet of cellular plastics film, said absorbent material having therein two layers of semi-repellent tissue.
7. An absorbent product according to claim 1 or 3 comprising a layer of absorbent material having a perforated cellular plastics film mounted on one face thereof by lines of adhesive.
8. An absorbent product according to claim 1 or 2 comprising a layer of absorbent material, a plastics film partially embracing said absorbent material for retaining absorbed fluid, a sheet of tissue entirely embracing said absorbent material and plastics film, a sheet of perforated cellular plastics film entirely embracing said tissue, and an attachment layer of pressure sensitive adhesive on said perforated plastics film.
9. An absorbent product according to claim 1 or 3 comprising a layer of absorbent material, a sheet of tissue entirely embracing said absorbent material, said tissue being covered on one face by a perforated portion of a sheet of cellular plastics film, and an attachment layer of pressure sensitive adhesive on said non-perforated portion of said plastics film.
10. An absorbent product according to any preceding claim wherein said plastics film is a polyolefin film.
11. An absorbent product according to claim 10 wherein said polyolefin film is a polyethylene film.
12. An absorbent product according to any preceding claim wherein said plastics film is of the foamed type.
13. An absorbent product according to any preceding claim wherein said film is a stretched polyolefin film having a substantially uniform cellular structure and formed from a composition comprising a crystalline linear polyolefin, which film has at least the following characteristics:
1. it comprises no more than 14% by volume of the film of closed cells;
2. it has an apparent density which is 90 to 20% of the density of the non-cellular unstretched composition;
3. it has a cell factor equal to or less than +0.65, which factor may be zero or negative;
4. it contains from 0 to 25% by weight based on the polyolefin of a filler and/or pigment;
5. it has a thickness of up to 11 mils;
6. it comprises cells with dimensions such that the average cell volume is no greater than 10-4 CC;;
7. it has been stretched in the plane of the film by an amount corresponding to a stretch ratio of at least
1.1:1 in one direction or in two substantially mutually perpendicular directions.
14. An absorbent product according to any preceding claim wherein said film has a weight range of 10 to 100 g/m2.
15. An absorbent product according to claim 14 wherein said film has a weight range of 10 to 50 g/m2.
16. An absorbent product according to any preceding claim wherein said film contains from 10 to 80 perforations /cm2.
17. An absorbent product according to any preceding claim wherein said film has a weight of about 16 g/m2 and 40 perforations /cm2.
18. An absorbent product according to any preceding claim wherein said absorbent material is formed from cotton or rayon fibres, foam, needle-loomed or felted cotton or rayon, or woodpulp.
19. An absorbent product according to any preceding claim wherein one said of the perforated film is pitted and oxidized by the electrical discharges, and the pitted and oxidized side of the film faces said absorbent material.
20. An absorbent product substantially as hereinbefore described with reference to and as shown in Figures 1 and 2 or Figures 3,4,5,6,7 or8 of the accompanying drawings.
21. A surgical drape or gown at least partly formed from cellular plastics film having perforations which have been produced by passing electrical discharge therethrough.
22. Disposable protective clothing at least partly formed from cellular plastics film having perforations which have been produced by passing electrical discharges therethrough.
23. Filtration media comprising at least one layer of cellular plastics film having perforations which have been produced by passing electrical discharged therethrough.
24. Filtration media according to claim 23 in the form of a face mask.
25. Filtration media according to claim 24 wherein said mask comprises a fibrous layer embraced between two outer support layers of perforated film.
26. Filtration media according to claim 23 wherein said mask is formed from a number of superimposed layers of perforated film.
27. Filtration media according to claim 26 wherein said mask is formed from four 16 g/m2 layers.
28. A nappy liner formed from cellular plastics film having perforations which have been produced by passing electrical discharges therethrough.
29. An examination drape or gown at least partly formed from cellular plastics film having perforations which have been produced by passing electrical discharges therethrough.
GB8131733A 1980-10-22 1981-10-21 Absorbent products Expired GB2085305B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
GB8033986 1980-10-22
GB8131733A GB2085305B (en) 1980-10-22 1981-10-21 Absorbent products

Publications (2)

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GB2085305A true GB2085305A (en) 1982-04-28
GB2085305B GB2085305B (en) 1985-01-03

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FR2539275A1 (en) * 1983-01-14 1984-07-20 Colgate Palmolive Co DISPOSABLE LAYER FOR ADULTS
EP0203821A2 (en) * 1985-05-31 1986-12-03 The Procter & Gamble Company Apertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission and use thereof in an absorbent article
US5078710A (en) * 1987-07-30 1992-01-07 Kao Corporation Surface material for sanitary articles
WO1995024878A1 (en) * 1994-03-15 1995-09-21 Procter & Gamble Pescara Technical Center S.P.A. Improved absorbent article with controlled distribution of liquid
GB2348136A (en) * 1999-03-24 2000-09-27 Johnson & Johnson Medical Ltd Wound dressings having low adherency
ITMI20111466A1 (en) * 2011-08-01 2013-02-02 Resintex Ind S R L COVER FOR HIGH ABSORPTION CAPACITY OF LIQUIDS, PARTICULARLY FOR OPERATING ROOMS.
US8398614B2 (en) 2002-10-28 2013-03-19 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
USD679404S1 (en) 2010-06-03 2013-04-02 Smith & Nephew, Inc. Organ protection layer
US8449509B2 (en) 2004-04-05 2013-05-28 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US8758313B2 (en) 2003-10-28 2014-06-24 Smith & Nephew Plc Apparatus and method for wound cleansing with actives
US8791316B2 (en) 2009-02-13 2014-07-29 Smith & Nephew Plc Wound packing
US8791315B2 (en) 2010-02-26 2014-07-29 Smith & Nephew, Inc. Systems and methods for using negative pressure wound therapy to manage open abdominal wounds
US9393158B2 (en) 2011-08-25 2016-07-19 Brightwake Limited Non-adherent wound dressing
US9616208B2 (en) 2003-10-28 2017-04-11 Smith & Nephew Plc Wound cleansing apparatus
US9950100B2 (en) 2004-04-28 2018-04-24 Smith & Nephew Plc Negative pressure wound therapy dressing system
US10058642B2 (en) 2004-04-05 2018-08-28 Bluesky Medical Group Incorporated Reduced pressure treatment system
US10086107B2 (en) 2006-04-03 2018-10-02 Brightwake Limited Adhesive laminates and applications thereof
US10207035B2 (en) 2004-05-21 2019-02-19 Smith & Nephew, Inc. Flexible reduced pressure treatment appliance
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US11298453B2 (en) 2003-10-28 2022-04-12 Smith & Nephew Plc Apparatus and method for wound cleansing with actives
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FR2539275A1 (en) * 1983-01-14 1984-07-20 Colgate Palmolive Co DISPOSABLE LAYER FOR ADULTS
GB2133291A (en) * 1983-01-14 1984-07-25 Colgate Palmolive Co Disposable adult diaper
EP0203821A2 (en) * 1985-05-31 1986-12-03 The Procter & Gamble Company Apertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission and use thereof in an absorbent article
EP0203821A3 (en) * 1985-05-31 1987-10-07 The Procter & Gamble Company Apertured macroscopically expanded three-dimensional polymeric web exhibiting breatheability and resistance to fluid transmission and use thereof in an absorbent article
US5078710A (en) * 1987-07-30 1992-01-07 Kao Corporation Surface material for sanitary articles
WO1995024878A1 (en) * 1994-03-15 1995-09-21 Procter & Gamble Pescara Technical Center S.P.A. Improved absorbent article with controlled distribution of liquid
GB2348136A (en) * 1999-03-24 2000-09-27 Johnson & Johnson Medical Ltd Wound dressings having low adherency
WO2000056256A1 (en) * 1999-03-24 2000-09-28 Johnson & Johnson Medical Limited Wound dressings having low adherency
JP2002538940A (en) * 1999-03-24 2002-11-19 ジョンソン・アンド・ジョンソン・メディカル・リミテッド Wound dressing, method for producing and utilizing the same
US6566577B1 (en) 1999-03-24 2003-05-20 Johnson & Johnson Medical Limited Wound dressings having low adherency
GB2348136B (en) * 1999-03-24 2003-06-04 Johnson & Johnson Medical Ltd Wound dressings having low adherency
AU778941B2 (en) * 1999-03-24 2004-12-23 Systagenix Wound Management Ip Co. B.V. Wound dressings having low adherency
US10842678B2 (en) 2002-10-28 2020-11-24 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US8398614B2 (en) 2002-10-28 2013-03-19 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US9844473B2 (en) 2002-10-28 2017-12-19 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US9844474B2 (en) 2002-10-28 2017-12-19 Smith & Nephew Plc Apparatus for aspirating, irrigating and cleansing wounds
US8758313B2 (en) 2003-10-28 2014-06-24 Smith & Nephew Plc Apparatus and method for wound cleansing with actives
US9616208B2 (en) 2003-10-28 2017-04-11 Smith & Nephew Plc Wound cleansing apparatus
US11298453B2 (en) 2003-10-28 2022-04-12 Smith & Nephew Plc Apparatus and method for wound cleansing with actives
US10058642B2 (en) 2004-04-05 2018-08-28 Bluesky Medical Group Incorporated Reduced pressure treatment system
US10842919B2 (en) 2004-04-05 2020-11-24 Smith & Nephew, Inc. Reduced pressure treatment system
US10350339B2 (en) 2004-04-05 2019-07-16 Smith & Nephew, Inc. Flexible reduced pressure treatment appliance
US10363346B2 (en) 2004-04-05 2019-07-30 Smith & Nephew, Inc. Flexible reduced pressure treatment appliance
US9198801B2 (en) 2004-04-05 2015-12-01 Bluesky Medical Group, Inc. Flexible reduced pressure treatment appliance
US11730874B2 (en) 2004-04-05 2023-08-22 Smith & Nephew, Inc. Reduced pressure treatment appliance
US8449509B2 (en) 2004-04-05 2013-05-28 Bluesky Medical Group Incorporated Flexible reduced pressure treatment appliance
US10105471B2 (en) 2004-04-05 2018-10-23 Smith & Nephew, Inc. Reduced pressure treatment system
US10758425B2 (en) 2004-04-28 2020-09-01 Smith & Nephew Plc Negative pressure wound therapy dressing system
US9950100B2 (en) 2004-04-28 2018-04-24 Smith & Nephew Plc Negative pressure wound therapy dressing system
US10758424B2 (en) 2004-04-28 2020-09-01 Smith & Nephew Plc Dressing and apparatus for cleansing the wounds
US10207035B2 (en) 2004-05-21 2019-02-19 Smith & Nephew, Inc. Flexible reduced pressure treatment appliance
US10086107B2 (en) 2006-04-03 2018-10-02 Brightwake Limited Adhesive laminates and applications thereof
US10363345B2 (en) 2009-02-13 2019-07-30 Smith & Nephew Plc Wound packing
US8791316B2 (en) 2009-02-13 2014-07-29 Smith & Nephew Plc Wound packing
US11357903B2 (en) 2009-02-13 2022-06-14 Smith & Nephew Plc Wound packing
US8791315B2 (en) 2010-02-26 2014-07-29 Smith & Nephew, Inc. Systems and methods for using negative pressure wound therapy to manage open abdominal wounds
US10765561B2 (en) 2010-02-26 2020-09-08 Smith & Nephew, Inc. Systems and methods for using negative pressure wound therapy to manage open abdominal wounds
USD717452S1 (en) 2010-06-03 2014-11-11 Smith & Nephew, Inc. Organ protection layer
USD692565S1 (en) 2010-06-03 2013-10-29 Smith & Nephew, Inc. Organ protection layer
USD679404S1 (en) 2010-06-03 2013-04-02 Smith & Nephew, Inc. Organ protection layer
USRE48282E1 (en) 2010-10-15 2020-10-27 Smith & Nephew Plc Medical dressing
USRE49227E1 (en) 2010-10-15 2022-10-04 Smith & Nephew Plc Medical dressing
ITMI20111466A1 (en) * 2011-08-01 2013-02-02 Resintex Ind S R L COVER FOR HIGH ABSORPTION CAPACITY OF LIQUIDS, PARTICULARLY FOR OPERATING ROOMS.
US9393158B2 (en) 2011-08-25 2016-07-19 Brightwake Limited Non-adherent wound dressing

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