US3307545A - Non-adherent dressing - Google Patents
Non-adherent dressing Download PDFInfo
- Publication number
- US3307545A US3307545A US393951A US39395164A US3307545A US 3307545 A US3307545 A US 3307545A US 393951 A US393951 A US 393951A US 39395164 A US39395164 A US 39395164A US 3307545 A US3307545 A US 3307545A
- Authority
- US
- United States
- Prior art keywords
- film
- openings
- absorbent
- fibers
- dressing
- 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.)
- Expired - Lifetime
Links
- 239000000835 fiber Substances 0.000 claims description 29
- 239000000758 substrate Substances 0.000 claims description 27
- 230000002745 absorbent Effects 0.000 claims description 23
- 239000002250 absorbent Substances 0.000 claims description 23
- 239000000126 substance Substances 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 239000004416 thermosoftening plastic Substances 0.000 claims description 3
- 206010052428 Wound Diseases 0.000 description 17
- 208000027418 Wounds and injury Diseases 0.000 description 16
- -1 polyethylene Polymers 0.000 description 11
- 230000001464 adherent effect Effects 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 239000002131 composite material Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 210000000416 exudates and transudate Anatomy 0.000 description 5
- 206010039509 Scab Diseases 0.000 description 4
- 230000004927 fusion Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 210000003127 knee Anatomy 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920000742 Cotton Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004745 nonwoven fabric Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920002689 polyvinyl acetate Polymers 0.000 description 3
- 239000011118 polyvinyl acetate Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000002964 rayon Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000012260 resinous material Substances 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 1
- 239000005041 Mylar™ Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 210000001124 body fluid Anatomy 0.000 description 1
- 239000010839 body fluid Substances 0.000 description 1
- 230000001609 comparable effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 230000008467 tissue growth Effects 0.000 description 1
Images
Classifications
-
- A61F13/01021—
-
- 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
- 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
- A61F2013/00217—Wound bandages not adhering to the wound
-
- 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
-
- 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
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
Definitions
- Bandages of this type are usually produced by uniting the web of absorbent fibers and the imperforate film by pressure heat sealing, if the film is thermoplastic at rela tively low temperatures; or by the use of a layer of adhesive or cement.
- the openings are subsequently made in the otherwise finished dressing by puncturing the film by various means, thus requiring a second production step.
- a layer of the adhesive substance covers the surface of the fibrous substrate which lies beneath the film openings, and such a coating may substantially reduce the absorbency of the dressing.
- a non-adherent dressing comprising an absorbent fibrous sheet containing on at least one surface an organic film with openings therein through which wound exudate may pass, in which a portion of the absorbent sheet lying beneath the area of said openings is recessed, and in which a substantial number of the exposed fibers of said absorbent sheet lying beneath the area of said openings are individually coated with the film substance.
- wound exudate can readily pass through the film openings; and, due to the recesses beneath the openings, few of the exposed fibers can contact the wound, and most of these fibers are coated with the smooth lubricous film substance.
- FIGURE 1 is an enlarged face view of a fragment of a non-adherent absorbent dressing of this invention.
- FIGURE 2 is a very much enlarged face view of a small portion of the fragment of FIGURE 1.
- FIGURE 3 is a diagrammatic cross section of the dressing of FIGURE 2 taken on line 3-3 and correspondingly enlarged.
- FIGURE 4 is a cross section of a platen containing blunt protuberances which may be used in the production of the dressings of this invention taken along lines 44 of FIGURE 5.
- FIGURE 5 is an inverted plan view of the platen of FIGURE 4.
- FIGURE 6 is a cross section of another platen containing blunt protuberances taken along 66 of FIG- U-RE 7.
- FIGURE 7 is an inverted plan view of the platen of FIGURE 6.
- FIGURES 1 through 3 there is shown a preferred embodiment 10 of the dressings of this invention.
- a non-adherent organic film 11 is bonded to an absorbent fibrous substrate 12, having individual fibers 13.
- the film contains a series of openings 14, and a portion of the absorbent fibrous substrate lying within the area beneath the openings contains a recess'17.
- Exposed fibers 18 of the absorbent substrate lying beneath the film openings are individually coated with the organic material of the film.
- the surfaces 16 of the dressing near the periphery of the recesses slope angularly downward, thus substantially eliminating the rough or sharp edges which may otherwise come in contact with the wound; and further urging the fibers within the substrate away from the wound contacting surface of the dressing.
- the fibrous material is recessed in the areas beneath the film openings, when the dressing is applied to a wound, few fibers come in contact with the skin, and most of these fibers are coated with the organic film material.
- the absorbent substrate may be made of any of the conventional woven or any of the convenional orientated or non-orientated, non-woven fabrics; although non-woven fabrics are more often used.
- Especially useful non-woven fabrics include those in which the textile fibers are disposed at random, such as those described in United States Patents 2,676,363 and 2,676,364 to C. H. Plummer; and those in which the fibers are predominantly orientated in one direction, such as those described in United States Patent 2,705,687 to Petterson and United States Patent 2,705,688 to Ness.
- the films used include any of the non-toxic, heat activatable films which are smooth and lubricous. These films should not contain any roughness or grainess which may be abrasive to the wound.
- the film should have a fusion point sufficiently low that the substrate fibers are not scorched when the film opening are produced. Since most cellulosic fibers will scorch when exposed to temperatures much in excess of 400 Fahrenheit, substances which have a fusion point below this temperature are preferred.
- the films should have a fusion point above about 250 Fahrenheit so that they can withstand sterilization. Films meeting all these specifications include, among others, polyethylene, polypropylene, and polyvinyl acetate. Especially useful are the high density polyethylenes softening around 325 Fahrenheit and melting at about 380 Fahrenheit. Another preferred film is polyethylene terephthatate, sold as Mylar by E. I. Du Pont de Nemours and Company.
- the non-adherent films may have a thickness of from about 0.2 mil to about 3 mils or more; however, films of about 1.25 mils are preferred.
- the film should be sufiiciently thick that enough heat activatable material will be available to coat the fibers in the area beneath the film openings; and yet thin enough so as to be fairly conformable and flexible.
- the dressing of this invention may be easily and efficiently produced by positioning the non-adherent film and the absorbent backing one on top of the other to form a composite body, and then pressing hot, relatively short, blunt protuberances, such as the knees of a screen, against the film side of the composite body.
- These relatively short, blunt protuberances may have either flat or curved surfaces, but curved surfaces are preferred.
- the film may be bonded to the substrate prior to pressing the hot blunt protuberances against the film side of the composite body; this is not necessary, as sufficient bonding occurs at the periphery of the area heated directly by the protuberances to hold the dressing together.
- the absorbency of the fibrous substrate may be reduced as previously mentioned.
- the series of protuberances may conveniently and preferably be the knees of a screen, or may be in the form of a platen of the type used in a conventional hand press, or in the form of rollers, belts, or the like. Examples of these blunt, short proturberances are shown in FIG- URES 4 through 7.
- FIGURES 4 and 5 there is illustrated a platen 11 containing blunt protuberances 12 shaped like ellipsoids and presenting only curved surface-s.
- FIGURES 6 and 7 illustrate a second platen 13 containing cubical blunt protuberances 14 having only flat surfaces.
- each protuberance should circumscribe an area of from about .00005 square inches to about .001 square inch or more, and preferably from about .0002 to about .0003 square inch.
- the depth of the protuberances used depends somewhat upon the thickness of the film. If the depth is not great enough, hot embossing of the surface of the dressing rather than melting of the film and the coating of the individual fibers may occur. While if the depth is too great, piercing of the film rather than controlled melting may occur. In general, for films having a thickness in the broad range previously noted, the depth of the face of the protuberances should be from about .001 inch to about .01 inch, and preferably from about .004 inch to about .007 inch.
- the protuberances are pre-treated with a release coating such as silicone or Teflon so that the film will not stick to the metal protuberances. Once these non-stick properties are obtained, they are retained for fairly long periods of time.
- the protuberances are then heated to a temperature above the fusion point of the film material and pressed against the film containing surfaces of the dressing. A contact time of only a few seconds is required.
- the localized heating by the blunt protuberances causes melting of the film in the area contacted.
- the film becomes firmly bound to the substrate; while in the center of the heated area, resinous material flows down into the substrate thus coating some of the underlying fibers.
- the pressure of the protuberance combined with the resinous material flowing into the substrate causes the fiber web to compact, thus forming a slight recess.
- the density of openings in the non-adherent film is dependent upon the area of the openings and the absorbency desired.
- the dressing contains from about 10 to about openings per square inch, and preferably from about 20 to about 40 openings per square inch.
- Example I A low density dull white pigmented polyethylene film, (made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleachedcombernoil cotton and 50% rayon orientated carded Web of 1.5 inch denier and 2 inch staple. The base fabric Weighs 320 grams per square yard.
- the composite is placed, film side up, in a hydraulic press fitted with an iron platen containing a series of relatively short raised blunt protuberances.
- a pressure of 40 p.s.i.g., is applied for 2 seconds to form a filmfiber laminate.
- the temperature of the platen containing the protuberances is 390 Fahrenheit.
- the raised protuberances are ellipsoidal in shape, such as those illustrated in FIGURE 5, with a long axis of .024 inch and a short axis of .014 inch.
- the depth of the protuberances is .006 inch, and they are set in the platen at 70 per square inch.
- the protuberances have previously been sprayed with a silicone release resin and cured at 300 Fahrenheit for an hour.
- the laminate is then cooled by a blast of cold air from an air knife. Upon examination, the laminate is found to be substantially as illustrated in FIGURES 1 through 3.
- Example II A low density dull white pigmented polyethylene film, (made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleached combernoil cotton and 50% rayon orientated carded web of 1.5-inch denier and 2-inch staple.
- the base fabric weighs 320 grams per square yard.
- the composite is placed, film side up, in a hydraulic press fitted with an iron screen of 20 x 20 mesh.
- the wire of the screen is 0.018 inch in diameter and the knees of the screen act as the short blunt protuberances.
- the temperature of the screen is 390 Fahrenheit.
- a pressure of 40 p.s.i.g. is applied by the hydraulic press for 2 seconds to form a film-fiber laminate.
- the laminate is then cooled by a blast of cold air from an air knife. Upon examination, the laminate is found to be substantially as described in FIGURES 1 through 3.
- Example III When polypropylene or polyvinyl acetate films are substituted for the polyethylene film and the procedures of Example I are carried out substantially as described, comp-arable results are obtained.
- Example IV A low density dull white pigmented polyethylene film, (-made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleached combernoil cotton, and 50% rayon orientated carded web of 15-inch denier and 2-inch staple.
- the base fabric Weighs 320 grams per square yard.
- the plied material is placed in a hydraulic press fitted With a smooth iron platen, and a pressure of 40 pounds per square inch is applied for 2 seconds to form a filmfiber laminate.
- the temperature of the platen is 390 Fahrenheit.
- the laminated structure is then placed, film side up, in a hydraulic press fitted with an iron platen containing a series of raised blunt protuberances, and the procedures of Example I are carried out substantially as described therein.
- An absorbent non-adherent dressing comprising an absorbent fibrous substrate having a large number of in dividual fibers and containing on at least one surface thereof and bonded thereto a nontacky thermoplastic or- .ganic film containing a series of openings, exposing individual fibers of said absorbent fibrous substrate, a substantial number of the exposed fibers of said substrate lying beneath the area of said openings being individually coated with the organic film substance and the portions of said absorbent substrate lying beneath the areas of the film openings each containing a recess.
- the dressing of claim 2 wherein the film is selected from the group consisting of polyethylene, polypropylene, and polyvinyl acetate.
Description
March 7, 1967 P. SUROWITZ NON-ADHERENT DRESSING Filed Sept. 2, 1964 INVENTOR. flew ,(YMWW/ rz United States Patent 3,307,545 NON-ADHERENT DRESSING Philip Surowitz, Middlesex, N.J., assignOr to Johnson & Johnson, a corporation of New Jersey Filed Sept. 2, 1964, Ser. No. 393,951 4 Claims. (Cl. 128-156) This invention relates to non-adherent dressings, and more particularly, to non-adherent dressings that readily absorb body fluids.
In the treatment of wounds, it is often desirable to cover the wound with a flexible absorbent dressing which will protect the wound and at the same time will absorb the wound exudate from the surface of the skin surrounding the wound site.
When absorbent pads of fibrous material are applied in direct contact with the surface of the skin near the open wound, scabs will often form around the fibers at or near the surface of the pad; or, the newly forming tissues will grow around these fibers, thus including them within the newly forming layer of skin. When it is attempted to remove a pad anchored to the scab or tissues in this manner, the wound may become reopened.
It has heretofore been proposed to cover one surface of the absorbent fibrous pad with a smooth, continuous, organic film. Such smooth surfaces do not normally adhereto or become part of the forming scab or tissue. When this is done, some means must be provided for absorption of wound exudate; and therefore the film usually contains a series of openings, this providing passages through which the wound exudate may be absorbed by the absorbent substrate. The fibers at the surface of the absorbent substrate which lie beneath these openings in the film are thus exposed, and may adhere to the scab or tissue growth as previously mentioned.
Bandages of this type are usually produced by uniting the web of absorbent fibers and the imperforate film by pressure heat sealing, if the film is thermoplastic at rela tively low temperatures; or by the use of a layer of adhesive or cement. The openings are subsequently made in the otherwise finished dressing by puncturing the film by various means, thus requiring a second production step.
When the films and fibrous substrates are united by cements or adhesives and the film subsequently punctured, a layer of the adhesive substance covers the surface of the fibrous substrate which lies beneath the film openings, and such a coating may substantially reduce the absorbency of the dressing.
According to this invention, a non-adherent dressing is provided comprising an absorbent fibrous sheet containing on at least one surface an organic film with openings therein through which wound exudate may pass, in which a portion of the absorbent sheet lying beneath the area of said openings is recessed, and in which a substantial number of the exposed fibers of said absorbent sheet lying beneath the area of said openings are individually coated with the film substance. When applied to a wound,
wound exudate can readily pass through the film openings; and, due to the recesses beneath the openings, few of the exposed fibers can contact the wound, and most of these fibers are coated with the smooth lubricous film substance.
ings in the film produced simultaneously, thus eliminating one of the production steps of the prior art dressings. This is accomplished by positioning the film and the fibrous material one on top of the other to form a composite body, and pressing a series of heated relatively short blunt protuberances, such as the knees of a screen, against the film side of the composite. In the areas at the periphery of those directly heated by the protuberances, the film becomes firmly bonded to the fiber substrate; while in the areas heated directly, the film melts and runs down into the substrate, thus individually coating the exposed surface fibers. The use of adhesives which tend to retard the absorbency of the dressing to prebond the film to the substrate is thus avoided.
The inventive concept will become more apparent upon reference to the accompanying drawing wherein:
FIGURE 1 is an enlarged face view of a fragment of a non-adherent absorbent dressing of this invention.
FIGURE 2 is a very much enlarged face view of a small portion of the fragment of FIGURE 1.
FIGURE 3 is a diagrammatic cross section of the dressing of FIGURE 2 taken on line 3-3 and correspondingly enlarged.
FIGURE 4 is a cross section of a platen containing blunt protuberances which may be used in the production of the dressings of this invention taken along lines 44 of FIGURE 5.
FIGURE 5 is an inverted plan view of the platen of FIGURE 4.
FIGURE 6 is a cross section of another platen containing blunt protuberances taken along 66 of FIG- U-RE 7.
FIGURE 7 is an inverted plan view of the platen of FIGURE 6.
Referring now to FIGURES 1 through 3, there is shown a preferred embodiment 10 of the dressings of this invention. A non-adherent organic film 11 is bonded to an absorbent fibrous substrate 12, having individual fibers 13. The film contains a series of openings 14, and a portion of the absorbent fibrous substrate lying within the area beneath the openings contains a recess'17. Exposed fibers 18 of the absorbent substrate lying beneath the film openings are individually coated with the organic material of the film.
The surfaces 16 of the dressing near the periphery of the recesses slope angularly downward, thus substantially eliminating the rough or sharp edges which may otherwise come in contact with the wound; and further urging the fibers within the substrate away from the wound contacting surface of the dressing.
Since the fibrous material is recessed in the areas beneath the film openings, when the dressing is applied to a wound, few fibers come in contact with the skin, and most of these fibers are coated with the organic film material.
In the dressings of this invention, the absorbent substrate may be made of any of the conventional woven or any of the convenional orientated or non-orientated, non-woven fabrics; although non-woven fabrics are more often used. Especially useful non-woven fabrics, described in detail in the prior art, include those in which the textile fibers are disposed at random, such as those described in United States Patents 2,676,363 and 2,676,364 to C. H. Plummer; and those in which the fibers are predominantly orientated in one direction, such as those described in United States Patent 2,705,687 to Petterson and United States Patent 2,705,688 to Ness.
The films used include any of the non-toxic, heat activatable films which are smooth and lubricous. These films should not contain any roughness or grainess which may be abrasive to the wound. When the dressings are produced according to the method described herein, the film should have a fusion point sufficiently low that the substrate fibers are not scorched when the film opening are produced. Since most cellulosic fibers will scorch when exposed to temperatures much in excess of 400 Fahrenheit, substances which have a fusion point below this temperature are preferred. In addition, the films should have a fusion point above about 250 Fahrenheit so that they can withstand sterilization. Films meeting all these specifications include, among others, polyethylene, polypropylene, and polyvinyl acetate. Especially useful are the high density polyethylenes softening around 325 Fahrenheit and melting at about 380 Fahrenheit. Another preferred film is polyethylene terephthatate, sold as Mylar by E. I. Du Pont de Nemours and Company.
The non-adherent films may have a thickness of from about 0.2 mil to about 3 mils or more; however, films of about 1.25 mils are preferred. When the dressings are produced by the method hereinafter described, the film should be sufiiciently thick that enough heat activatable material will be available to coat the fibers in the area beneath the film openings; and yet thin enough so as to be fairly conformable and flexible.
The dressing of this invention may be easily and efficiently produced by positioning the non-adherent film and the absorbent backing one on top of the other to form a composite body, and then pressing hot, relatively short, blunt protuberances, such as the knees of a screen, against the film side of the composite body. These relatively short, blunt protuberances may have either flat or curved surfaces, but curved surfaces are preferred.
Although the film may be bonded to the substrate prior to pressing the hot blunt protuberances against the film side of the composite body; this is not necessary, as sufficient bonding occurs at the periphery of the area heated directly by the protuberances to hold the dressing together. When the film and the substrate are prebonded with adhesives, the absorbency of the fibrous substrate may be reduced as previously mentioned.
The series of protuberances may conveniently and preferably be the knees of a screen, or may be in the form of a platen of the type used in a conventional hand press, or in the form of rollers, belts, or the like. Examples of these blunt, short proturberances are shown in FIG- URES 4 through 7. In FIGURES 4 and 5, there is illustrated a platen 11 containing blunt protuberances 12 shaped like ellipsoids and presenting only curved surface-s. FIGURES 6 and 7 illustrate a second platen 13 containing cubical blunt protuberances 14 having only flat surfaces.
The widest cross section of each protuberance should circumscribe an area of from about .00005 square inches to about .001 square inch or more, and preferably from about .0002 to about .0003 square inch.
The depth of the protuberances used depends somewhat upon the thickness of the film. If the depth is not great enough, hot embossing of the surface of the dressing rather than melting of the film and the coating of the individual fibers may occur. While if the depth is too great, piercing of the film rather than controlled melting may occur. In general, for films having a thickness in the broad range previously noted, the depth of the face of the protuberances should be from about .001 inch to about .01 inch, and preferably from about .004 inch to about .007 inch.
The protuberances are pre-treated with a release coating such as silicone or Teflon so that the film will not stick to the metal protuberances. Once these non-stick properties are obtained, they are retained for fairly long periods of time. The protuberances are then heated to a temperature above the fusion point of the film material and pressed against the film containing surfaces of the dressing. A contact time of only a few seconds is required.
The localized heating by the blunt protuberances causes melting of the film in the area contacted. At the periphery of the area contacted by the protuberances, the film becomes firmly bound to the substrate; while in the center of the heated area, resinous material flows down into the substrate thus coating some of the underlying fibers. The pressure of the protuberance combined with the resinous material flowing into the substrate causes the fiber web to compact, thus forming a slight recess.
The density of openings in the non-adherent film is dependent upon the area of the openings and the absorbency desired. When protuberances having a cross section in the preferred range mentioned above are used, the dressing contains from about 10 to about openings per square inch, and preferably from about 20 to about 40 openings per square inch.
The invention will be further illustrated in greater detail by the following examples. It should be understood that although these examples may describe some of the more specific features of the invention, they are given only for the purpose of illustration and the invention should not be construed as limited thereto.
Example I A low density dull white pigmented polyethylene film, (made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleachedcombernoil cotton and 50% rayon orientated carded Web of 1.5 inch denier and 2 inch staple. The base fabric Weighs 320 grams per square yard.
The composite is placed, film side up, in a hydraulic press fitted with an iron platen containing a series of relatively short raised blunt protuberances. A pressure of 40 p.s.i.g., is applied for 2 seconds to form a filmfiber laminate. The temperature of the platen containing the protuberances is 390 Fahrenheit. The raised protuberances are ellipsoidal in shape, such as those illustrated in FIGURE 5, with a long axis of .024 inch and a short axis of .014 inch. The depth of the protuberances is .006 inch, and they are set in the platen at 70 per square inch. The protuberances have previously been sprayed with a silicone release resin and cured at 300 Fahrenheit for an hour.
The laminate is then cooled by a blast of cold air from an air knife. Upon examination, the laminate is found to be substantially as illustrated in FIGURES 1 through 3.
Example II A low density dull white pigmented polyethylene film, (made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleached combernoil cotton and 50% rayon orientated carded web of 1.5-inch denier and 2-inch staple. The base fabric weighs 320 grams per square yard.
The composite is placed, film side up, in a hydraulic press fitted with an iron screen of 20 x 20 mesh. The wire of the screen is 0.018 inch in diameter and the knees of the screen act as the short blunt protuberances.
The temperature of the screen is 390 Fahrenheit. A pressure of 40 p.s.i.g. is applied by the hydraulic press for 2 seconds to form a film-fiber laminate. The laminate is then cooled by a blast of cold air from an air knife. Upon examination, the laminate is found to be substantially as described in FIGURES 1 through 3.
Example III When polypropylene or polyvinyl acetate films are substituted for the polyethylene film and the procedures of Example I are carried out substantially as described, comp-arable results are obtained.
Example IV A low density dull white pigmented polyethylene film, (-made by Ethyl Visking Corporation) 0.9 mil thick, is positioned on the surface of a 50% bleached combernoil cotton, and 50% rayon orientated carded web of 15-inch denier and 2-inch staple. The base fabric Weighs 320 grams per square yard.
The plied material is placed in a hydraulic press fitted With a smooth iron platen, and a pressure of 40 pounds per square inch is applied for 2 seconds to form a filmfiber laminate. The temperature of the platen is 390 Fahrenheit.
The laminated structure is then placed, film side up, in a hydraulic press fitted with an iron platen containing a series of raised blunt protuberances, and the procedures of Example I are carried out substantially as described therein.
Upon examination, the completed laminate is again found to be as illustrated in FIGURES 1 through 3.
Although several specific examples of the inventive concept have been described, the same should not be construed as limited thereby to the specific features mentioned therein, but to include various other equivalent features as set forth in the claims appended hereto. It is understood that any suitable changes may be made without departing from the spirit and scope of the invention.
What is claimed is:
1. An absorbent non-adherent dressing comprising an absorbent fibrous substrate having a large number of in dividual fibers and containing on at least one surface thereof and bonded thereto a nontacky thermoplastic or- .ganic film containing a series of openings, exposing individual fibers of said absorbent fibrous substrate, a substantial number of the exposed fibers of said substrate lying beneath the area of said openings being individually coated with the organic film substance and the portions of said absorbent substrate lying beneath the areas of the film openings each containing a recess.
2. The dressing of claim 1 wherein the surface of the dressing at the periphery of the film openings is angularly depressed.
3. The dressing of claim 2 wherein the film is selected from the group consisting of polyethylene, polypropylene, and polyvinyl acetate.
4. The dressing of claim 3 wherein the film is polyethylene.
References Cited by the Examiner UNITED STATES PATENTS 3,073,304 1/1963 'Schaar 128l56 3,085,572 4/ 1963 Blackford 128-156 3,197,355 7/1965 Copeland l56148 ADELE M. EAGER, Primary Examiner.
Claims (1)
1. AN ABSORBENT NON-ADHERENT DRESSING COMPRISING AN ABSORBENT FIBROUS SUBSTRATE HAVING A LARGE NUMBER OF INDIVIDUAL FIBERS AND CONTAINING ON AT LEAST ONE SURFACE THEREOF AND BONDED THERETO A NONTACKY THERMOPLASTIC ORGANIC FILM CONTAINING A SERIES OF OPENINGS, EXPOSING INDIVIDUAL FIBERS OF SAID ABSORBENT FIBROUS SUBSTRATE, A SUBSTANTIAL NUMBER OF THE EXPOSED FIBERS OF SAID SUBSTRATE LYING BENEATH THE AREA OF SAID OPENINGS BEING INDIVIDUALLY COATED WITH THE ORGANIC FILM SUBSTANCE AND THE PORTIONS OF SAID ABSORBENT SUBSTRATE LYING BENEATH THE AREAS OF THE FILM OPENINGS EACH CONTAINING A RECESS.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US393951A US3307545A (en) | 1964-09-02 | 1964-09-02 | Non-adherent dressing |
GB37329/65A GB1063066A (en) | 1964-09-02 | 1965-09-01 | Non-adherent dressing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US393951A US3307545A (en) | 1964-09-02 | 1964-09-02 | Non-adherent dressing |
Publications (1)
Publication Number | Publication Date |
---|---|
US3307545A true US3307545A (en) | 1967-03-07 |
Family
ID=23556904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US393951A Expired - Lifetime US3307545A (en) | 1964-09-02 | 1964-09-02 | Non-adherent dressing |
Country Status (2)
Country | Link |
---|---|
US (1) | US3307545A (en) |
GB (1) | GB1063066A (en) |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3434472A (en) * | 1965-04-08 | 1969-03-25 | Smith & Nephew | Surgical dressings |
US3441021A (en) * | 1967-02-15 | 1969-04-29 | Kimberly Clark Co | Non-adherent surgical dressing |
US3481806A (en) * | 1964-09-23 | 1969-12-02 | Huyck Corp | Method of making a bandaging and dressing material |
US3482570A (en) * | 1966-01-22 | 1969-12-09 | Wolfgang Duffner | Surgical dressing and method of producing the same |
US3509007A (en) * | 1965-03-05 | 1970-04-28 | Johnson & Johnson | Perforated sheet material |
FR2433938A1 (en) * | 1978-06-21 | 1980-03-21 | Johnson & Johnson | ABSORBENT LINING AND MANUFACTURING METHOD |
US4550725A (en) * | 1977-10-21 | 1985-11-05 | Phillips Petroleum Company | Method and apparatus for absorbing moisture |
US4629457A (en) * | 1978-06-21 | 1986-12-16 | Chicopee | Absorbent facing and method for making the same |
US4867150A (en) * | 1987-01-20 | 1989-09-19 | The B. F. Goodrich Company | Perforated elastomeric soft film and wound dressing made therewith |
EP0360929A1 (en) * | 1988-09-02 | 1990-04-04 | VERATEC, INC. (a Delaware corp.) | Fibre-film substrate |
US4935087A (en) * | 1987-12-14 | 1990-06-19 | The Kendall Company | Method of making an absorbent dressing |
US5018515A (en) * | 1987-12-14 | 1991-05-28 | The Kendall Company | See through absorbent dressing |
US5328449A (en) * | 1992-11-19 | 1994-07-12 | Wells Lamont | Wound dressing for the hands |
US5380337A (en) * | 1994-01-24 | 1995-01-10 | Romaine; Richard A. | Mesh-type skin biopsy appliance |
US5437621A (en) * | 1992-11-19 | 1995-08-01 | Marmon Holdings, Inc. | Medical dressing of a multilayered material |
US5536555A (en) * | 1993-12-17 | 1996-07-16 | Kimberly-Clark Corporation | Liquid permeable, quilted film laminates |
US5613942A (en) * | 1994-10-04 | 1997-03-25 | Minnesota Mining And Manufacturing Company | Adhesive sheet material suitable for use on wet surfaces |
US5643240A (en) * | 1993-12-30 | 1997-07-01 | Kimberly-Clark Corporation | Apertured film/nonwoven composite for personal care absorbent articles and the like |
US5709829A (en) * | 1992-11-17 | 1998-01-20 | Pantex S.R.L. | Method for manufacturing product in membrane or film form |
US5735984A (en) * | 1994-11-08 | 1998-04-07 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
US5879494A (en) * | 1996-09-23 | 1999-03-09 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
US5914282A (en) * | 1995-02-21 | 1999-06-22 | Minnesota Mining And Manufacturing Company | Adhesive sheet articles |
US6060638A (en) * | 1995-12-22 | 2000-05-09 | Kimberly-Clark Worldwide, Inc. | Matched permeability liner/absorbent structure system for absorbent articles and the like |
US20040127839A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Wound dressing having a facing surface with variable tackiness |
US20050059918A1 (en) * | 2003-09-17 | 2005-03-17 | Sigurjonsson Gudmundur Fertram | Wound dressing and method for manufacturing the same |
US20050215932A1 (en) * | 2003-09-17 | 2005-09-29 | Sigurjonsson Gudmundur F | Wound dressing and method for manufacturing the same |
WO2006136024A1 (en) * | 2005-06-23 | 2006-12-28 | Alessandro Barberio | Cast venting devices made of two flexible layers |
US20070066925A1 (en) * | 2005-01-28 | 2007-03-22 | Gudnason Palmar I | Wound dressing and method for manufacturing the same |
US20070191749A1 (en) * | 2006-02-14 | 2007-08-16 | Barberio Alessandro A | Orthopedic braces and casts with aerating arrangements |
US20080177253A1 (en) * | 2004-04-13 | 2008-07-24 | Boehringer Laboratories Inc. | Growth stimulating wound dressing with improved contact surfaces |
EP2059204A2 (en) * | 2006-07-07 | 2009-05-20 | Boehringer Technologies L.P. | Growth stimulating wound dressing with improved contact surfaces |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ218176A (en) * | 1986-11-05 | 1988-09-29 | Ueb Packaging Ltd | Packaging laminate with porous layer and liquid absorbent layer |
SE501455C2 (en) * | 1992-05-21 | 1995-02-20 | Moelnlycke Ab | Process for manufacturing a material suitable as a topsheet in a disposable absorbent article and such material |
GB0224986D0 (en) | 2002-10-28 | 2002-12-04 | Smith & Nephew | Apparatus |
GB0325120D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with actives |
GB0325126D0 (en) | 2003-10-28 | 2003-12-03 | Smith & Nephew | Apparatus with heat |
US8758313B2 (en) | 2003-10-28 | 2014-06-24 | Smith & Nephew Plc | Apparatus and method for wound cleansing with actives |
US11298453B2 (en) | 2003-10-28 | 2022-04-12 | Smith & Nephew Plc | Apparatus and method for wound cleansing with actives |
US8062272B2 (en) | 2004-05-21 | 2011-11-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
US10058642B2 (en) | 2004-04-05 | 2018-08-28 | Bluesky Medical Group Incorporated | Reduced pressure treatment system |
US7909805B2 (en) | 2004-04-05 | 2011-03-22 | Bluesky Medical Group Incorporated | Flexible reduced pressure treatment appliance |
GB0409446D0 (en) | 2004-04-28 | 2004-06-02 | Smith & Nephew | Apparatus |
GB0902368D0 (en) | 2009-02-13 | 2009-04-01 | Smith & Nephew | 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 |
USD692565S1 (en) | 2010-06-03 | 2013-10-29 | Smith & Nephew, Inc. | Organ protection layer |
CA140188S (en) | 2010-10-15 | 2011-11-07 | Smith & Nephew | Medical dressing |
CA140189S (en) | 2010-10-15 | 2011-11-07 | Smith & Nephew | Medical dressing |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3073304A (en) * | 1960-08-08 | 1963-01-15 | Kendall & Co | Perforated adhesive tape and bandage formed therewith |
US3085572A (en) * | 1961-10-06 | 1963-04-16 | Johnson & Johnson | Tape |
US3197355A (en) * | 1961-04-20 | 1965-07-27 | Sackner Prod Inc | Method of making a pattern coated backing and product |
-
1964
- 1964-09-02 US US393951A patent/US3307545A/en not_active Expired - Lifetime
-
1965
- 1965-09-01 GB GB37329/65A patent/GB1063066A/en not_active Expired
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3073304A (en) * | 1960-08-08 | 1963-01-15 | Kendall & Co | Perforated adhesive tape and bandage formed therewith |
US3197355A (en) * | 1961-04-20 | 1965-07-27 | Sackner Prod Inc | Method of making a pattern coated backing and product |
US3085572A (en) * | 1961-10-06 | 1963-04-16 | Johnson & Johnson | Tape |
Cited By (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3481806A (en) * | 1964-09-23 | 1969-12-02 | Huyck Corp | Method of making a bandaging and dressing material |
US3509007A (en) * | 1965-03-05 | 1970-04-28 | Johnson & Johnson | Perforated sheet material |
US3434472A (en) * | 1965-04-08 | 1969-03-25 | Smith & Nephew | Surgical dressings |
US3482570A (en) * | 1966-01-22 | 1969-12-09 | Wolfgang Duffner | Surgical dressing and method of producing the same |
US3441021A (en) * | 1967-02-15 | 1969-04-29 | Kimberly Clark Co | Non-adherent surgical dressing |
US4550725A (en) * | 1977-10-21 | 1985-11-05 | Phillips Petroleum Company | Method and apparatus for absorbing moisture |
FR2433938A1 (en) * | 1978-06-21 | 1980-03-21 | Johnson & Johnson | ABSORBENT LINING AND MANUFACTURING METHOD |
US4629457A (en) * | 1978-06-21 | 1986-12-16 | Chicopee | Absorbent facing and method for making the same |
US4867150A (en) * | 1987-01-20 | 1989-09-19 | The B. F. Goodrich Company | Perforated elastomeric soft film and wound dressing made therewith |
US4935087A (en) * | 1987-12-14 | 1990-06-19 | The Kendall Company | Method of making an absorbent dressing |
US5018515A (en) * | 1987-12-14 | 1991-05-28 | The Kendall Company | See through absorbent dressing |
EP0360929A1 (en) * | 1988-09-02 | 1990-04-04 | VERATEC, INC. (a Delaware corp.) | Fibre-film substrate |
US5709829A (en) * | 1992-11-17 | 1998-01-20 | Pantex S.R.L. | Method for manufacturing product in membrane or film form |
US5814389A (en) * | 1992-11-17 | 1998-09-29 | Pantex, S.R.L. | Apertured three-dimensional product in membrane or film form for covering sanitary, disposable absorbent products |
US5437621A (en) * | 1992-11-19 | 1995-08-01 | Marmon Holdings, Inc. | Medical dressing of a multilayered material |
US5328449A (en) * | 1992-11-19 | 1994-07-12 | Wells Lamont | Wound dressing for the hands |
US5536555A (en) * | 1993-12-17 | 1996-07-16 | Kimberly-Clark Corporation | Liquid permeable, quilted film laminates |
US5643240A (en) * | 1993-12-30 | 1997-07-01 | Kimberly-Clark Corporation | Apertured film/nonwoven composite for personal care absorbent articles and the like |
US5380337A (en) * | 1994-01-24 | 1995-01-10 | Romaine; Richard A. | Mesh-type skin biopsy appliance |
US5613942A (en) * | 1994-10-04 | 1997-03-25 | Minnesota Mining And Manufacturing Company | Adhesive sheet material suitable for use on wet surfaces |
US5735984A (en) * | 1994-11-08 | 1998-04-07 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
US5914282A (en) * | 1995-02-21 | 1999-06-22 | Minnesota Mining And Manufacturing Company | Adhesive sheet articles |
US6060638A (en) * | 1995-12-22 | 2000-05-09 | Kimberly-Clark Worldwide, Inc. | Matched permeability liner/absorbent structure system for absorbent articles and the like |
US5879494A (en) * | 1996-09-23 | 1999-03-09 | Minnesota Mining And Manufacturing Company | Method of aperturing thin sheet materials |
US7468471B2 (en) | 2002-12-31 | 2008-12-23 | Ossur, Hf | Wound dressing having a facing surface with variable tackiness |
US7696400B2 (en) | 2002-12-31 | 2010-04-13 | Ossur Hf | Wound dressing |
US20040127829A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Wound dressing |
US20040127835A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Method for producing a wound dressing |
US20040127836A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Wound dressing |
US20040138604A1 (en) * | 2002-12-31 | 2004-07-15 | Sigurjonsson Gudmundur Fertram | Wound dressing |
US8247635B2 (en) | 2002-12-31 | 2012-08-21 | Ossur Hf | Wound dressing |
US7910793B2 (en) | 2002-12-31 | 2011-03-22 | Ossur Hf | Wound dressing |
US20100160884A1 (en) * | 2002-12-31 | 2010-06-24 | Gudmundur Fertram Sigurjonsson | Wound dressing |
US20040127834A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Method for producing a wound dressing |
US7488864B2 (en) | 2002-12-31 | 2009-02-10 | Ossur Hf | Wound dressing |
US7470830B2 (en) | 2002-12-31 | 2008-12-30 | Ossur, Hf | Method for producing a wound dressing |
US7304202B2 (en) | 2002-12-31 | 2007-12-04 | Ossur Hf | Wound dressing |
US20080039763A1 (en) * | 2002-12-31 | 2008-02-14 | Sigurjonsson Gudmundur F | Wound dressing |
US20040127839A1 (en) * | 2002-12-31 | 2004-07-01 | Sigurjonsson Gudmundur Fertram | Wound dressing having a facing surface with variable tackiness |
US7459598B2 (en) | 2002-12-31 | 2008-12-02 | Ossur, Hf | Wound dressing |
US20080255493A1 (en) * | 2002-12-31 | 2008-10-16 | Gudmundur Fertram Sigurjonsson | Wound dressing |
US7411109B2 (en) | 2002-12-31 | 2008-08-12 | Ossur Hf | Method for producing a wound dressing |
US7423193B2 (en) | 2002-12-31 | 2008-09-09 | Ossur, Hf | Wound dressing |
US8093445B2 (en) | 2003-09-17 | 2012-01-10 | Ossur Hf | Wound dressing and method for manufacturing the same |
US20080269660A1 (en) * | 2003-09-17 | 2008-10-30 | Gudmundur Fertram Sigurjonsson | Wound dressing and method for manufacturing the same |
US7396975B2 (en) | 2003-09-17 | 2008-07-08 | Ossur Hf | Wound dressing and method for manufacturing the same |
US20050215932A1 (en) * | 2003-09-17 | 2005-09-29 | Sigurjonsson Gudmundur F | Wound dressing and method for manufacturing the same |
US20050059918A1 (en) * | 2003-09-17 | 2005-03-17 | Sigurjonsson Gudmundur Fertram | Wound dressing and method for manufacturing the same |
US7745682B2 (en) | 2003-09-17 | 2010-06-29 | Ossur Hf | Wound dressing and method for manufacturing the same |
US7531711B2 (en) | 2003-09-17 | 2009-05-12 | Ossur Hf | Wound dressing and method for manufacturing the same |
US20090124950A1 (en) * | 2003-09-17 | 2009-05-14 | Gudmundur Fertram Sigurjonsson | Wound dressing and method for manufacturing the same |
US20080177253A1 (en) * | 2004-04-13 | 2008-07-24 | Boehringer Laboratories Inc. | Growth stimulating wound dressing with improved contact surfaces |
US7951124B2 (en) | 2004-04-13 | 2011-05-31 | Boehringer Technologies, Lp | Growth stimulating wound dressing with improved contact surfaces |
US20070066925A1 (en) * | 2005-01-28 | 2007-03-22 | Gudnason Palmar I | Wound dressing and method for manufacturing the same |
US20070255194A1 (en) * | 2005-01-28 | 2007-11-01 | Gudnason Palmar I | Wound dressing and method for manufacturing the same |
US7381860B2 (en) * | 2005-01-28 | 2008-06-03 | Hf Ossur | Wound dressing and method for manufacturing the same |
WO2006136024A1 (en) * | 2005-06-23 | 2006-12-28 | Alessandro Barberio | Cast venting devices made of two flexible layers |
US20070191749A1 (en) * | 2006-02-14 | 2007-08-16 | Barberio Alessandro A | Orthopedic braces and casts with aerating arrangements |
US8012112B2 (en) | 2006-02-14 | 2011-09-06 | Alessandro Aldo Barberio | Orthopedic braces and casts with aerating arrangements |
EP2059204A2 (en) * | 2006-07-07 | 2009-05-20 | Boehringer Technologies L.P. | Growth stimulating wound dressing with improved contact surfaces |
EP2059204A4 (en) * | 2006-07-07 | 2010-12-01 | Boehringer Technologies Lp | Growth stimulating wound dressing with improved contact surfaces |
Also Published As
Publication number | Publication date |
---|---|
GB1063066A (en) | 1967-03-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3307545A (en) | Non-adherent dressing | |
US3331728A (en) | Perforate film-fiber laminate | |
US3441021A (en) | Non-adherent surgical dressing | |
US3285245A (en) | Absorbent wound dressing | |
US3292619A (en) | Absorbent dressing | |
US3545442A (en) | Bandaging and dressing material | |
EP1880840B1 (en) | Absorbent article | |
CA2364703C (en) | Wound dressings having low adherency | |
US5171238A (en) | Absorbent pad with fibrous facing sheet | |
US3156242A (en) | Flexible absorbent sheet | |
EP0214867B1 (en) | Absorbent pad | |
TW398970B (en) | Method of producing an apertured covering sheet for an absorbent article and a material produced in accordance with the method | |
US3967623A (en) | Disposable absorbent pad | |
US3886941A (en) | Diaper insert | |
US4995382A (en) | Wound dressing, manufacture and use | |
EP2295243A2 (en) | Laminated material and skin contacting products formed therefrom | |
IE41647L (en) | Absorbent article | |
US3416524A (en) | Surgical dressing | |
US3416525A (en) | Stabilized non-adherent dressing | |
IE45553L (en) | Absorbent articles | |
US4193404A (en) | Stretchable and conformable pad | |
US3053252A (en) | Embossed bandaging material | |
MXPA03005527A (en) | Absorbent article. | |
US3459618A (en) | Method of making absorbent dressings | |
JPH02302255A (en) | Absorber composite and absorber product |