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WO1999009090A1 - Film perfore epousant les formes, a utiliser dans un pansement - Google Patents

Film perfore epousant les formes, a utiliser dans un pansement Download PDF

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Publication number
WO1999009090A1
WO1999009090A1 PCT/US1998/017307 US9817307W WO9909090A1 WO 1999009090 A1 WO1999009090 A1 WO 1999009090A1 US 9817307 W US9817307 W US 9817307W WO 9909090 A1 WO9909090 A1 WO 9909090A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
adhesive
substrate film
alpha
poly
Prior art date
Application number
PCT/US1998/017307
Other languages
English (en)
Inventor
Zhongshan Chen Chen
James P. Dipito
James E. Pelkie
Original Assignee
Tredegar Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tredegar Corporation filed Critical Tredegar Corporation
Priority to AU92008/98A priority Critical patent/AU9200898A/en
Publication of WO1999009090A1 publication Critical patent/WO1999009090A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/0203—Adhesive bandages or dressings with fluid retention members
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene

Definitions

  • the present invention relates to perforated contoured films, and more particularly, to perforated contoured films adapted for use in items such as bandages.
  • a bandage typically will include a substrate, an adhesive layer applied to the substrate and a pad to be positioned adjacent to the area that the bandage covers.
  • the skin upon which the bandage is applied is an elastic substance which flexes with the movement of the patient . Bandages that do not flex with the movement of the patient apply stress to the skin, and can apply stress to the wound. Therefore, there is a need for films having elastic properties that can be used as the substrate of a bandage and allow the bandage to flex with the movement of the user.
  • the adhesive of the bandage secures the bandage to the user.
  • the adhesive should have adequate adhesion to the substrate, be uniformly distributed on the substrate, have adequate adhesion to the skin, possess air permeability, and elasticity. Therefore, there is a need for substrate compositions with improved adhesive adhesion properties and processes and equipment for applying adhesive to a bandage which facilitate these requirements for the adhesive .
  • the present invention comprises a film- comprising a polymer blend including from about 15% to about 85% parts by weight of a poly-alpha-olefin and from about 15% to about 85% by weight of an ethylene copolymer.
  • the poly-alpha-olefin includes at least one of the resins from the group of a poly-alpha-olefin elastomer, an ultra low density polyethylene, and a metallocene polyethylene.
  • the ethylene copolymer includes at least one of the resins from the group of an ethylene vinyl acetate copolymer, an ethylene methyl acrylate copolymer, and an ethylene butyl acrylate copolymer.
  • the poly-alpha-olefin includes a poly-alpha-olefin elastomer and an ultra low density polyethylene
  • the ethylene copolymer includes an ethylene vinyl acetate copolymer, with the poly-alpha- olefin elastomer, the ultra low density polyethylene, the said ethylene vinyl acetate copolymer being present in the polymer blend in substantially equal portions.
  • the invention comprises an improved bandage of the type having a substrate film with a first side and a second side, an adhesive coating disposed on at least a portion of the first side of said substrate film, and a pad secured to the first side of said substrate film, the improvement comprising said substrate film being a polymer blend including from about 15% to about 85% parts by weight of a poly-alpha-olefin, and from about 15% to about 85% by weight of an ethylene copolymer.
  • the present invention comprises an improved bandage of the type having a substrate film with a first side and a second side, an adhesive coating disposed on at least a portion of the first side of the substrate film, and a pad secured to the first side of the substrate film, the improvement comprising the substrate film being a polymer blend substantially free of metal stearates.
  • the present invention comprises a method of disposing and adhesive coating onto a substrate film having an adhesive side, comprising the steps of forming a plurality of recesses in the adhesive side of the film, forming a plurality of perforations in the substrate film, and melt blowing an adhesive onto at least a portion of the adhesive side of the substrate film.
  • FIG. 1 is a fragmentary enlarged perspective view of one embodiment of the perforated contoured film of the present invention
  • FIG. 2 is a perspective view of a bandage incorporating an embodiment of the present invention
  • FIG. 3 is a schematic diagram illustrating one embodiment of a method for making the perforated contoured film in FIG. 1;
  • FIG. 4 is an enlarged, sectional view showing a segment of the forming surface as employed in the process illustrated in FIG. 3;
  • FIG. 5 is a schematic diagram illustrating one method of applying the adhesive to the film of FIG. 1, to be utilized in the bandage according to FIG. 3 ;
  • FIG. 6 is a schematic diagram illustrating another method of applying the adhesive to the film of FIG. 1, to be utilized in the bandage according to FIG. 3.
  • FIG. 7 is a schematic diagram illustrating another method of applying the adhesive to the film of FIG. 1, to be utilized in the bandage according to FIG. 3.
  • the film 100 generally includes planar regions 110, funnel protrusions 120, and perforations 130 within the funnel protrusions 120.
  • the film 100 has a female side 101 and a male side 102.
  • the funnel protrusions 120 have an open wide-mouth base 122 located on the female side 101 of the film 100, and an apex 124 located on the male side 102 of the film 100.
  • the perforations 130 are preferably located in the apex 124 of the funnel protrusions 120.
  • the bandage 10 includes the substrate or film 100, an adhesive 200 disposed on the film 100, and a pad 300 secured to the film 100.
  • the adhesive 200 and pad 300 of the bandage 10 are preferably disposed on the female side 101 of the film 100.
  • FIG. 3 there is shown a schematic diagram illustrating one embodiment of a method for making the perforated contoured film 100.
  • a hot flat sheet 100a of thermoplastic film is extruded from an extruder 410 and passes to a roller 420.
  • the roller 420 generally includes a drum 421 supported at each end by a centrally disposed axle 422, which is supported by means of stationary axle supports 423.
  • a gear drive may be employed which is adapted to mesh with gearing provided on the drum element itself, or a pulley drive may be connected to the drum by means of caps provided on the ends thereof .
  • the drum 421 of the contouring and perforating roller 420 has a cylindrical outer surface 424, a cylindrical inner surface 425, and is highly perforated with holes 426 between the outer surface 424 and the inner surface 425.
  • a molding element or screen 430 is mounted to the drum 421 for contact with the film 100a, and is adapted to be rotated with the drum 10.
  • a vacuum chamber 440 is located inside the drum 421 for applying a vacuum to the inside surface 425 of the drum 421 passing over a stationary location.
  • the molding element 430 is mounted around the cylindrical surface 424 of the drum 421.
  • the molding element 430 has forming recesses 431 in the exterior surface thereof.
  • the molding element 430 also has perforations 432 located in the forming recesses 431 that are in fluid communication with the perforations 426 in the drum 421.
  • the molding element 430 may be a welded or a non-welded screen and is preferably formed as an integral unit adapted to be slipped onto the drum 421 from an end thereof, or to be wrapped around the drum 421 and then secured thereto in any suitable manner. Still referring to FIGS.
  • the vacuum chamber 440 is positioned within the drum 421 and opens at a fixed stationary position adjacent to the inner surface 425 of the drum 421.
  • the vacuum chamber 440 is formed of two plates 441 and 442, that are fixed in stationary position.
  • seals 445 are provided on each of the plates 441 and 442 to form a seal over a limited portion of the inner periphery of the drum 421.
  • the vacuum chamber or slot 440 is sealed to the drum 421 and may be evacuated or reduced in pressure by pumping equipment connected to the chamber 440 in any suitable manner. Vacuum from the vacuum chamber 440 is applied to the inner surface 425 and the holes 426 of the drum 421.
  • the hot flat sheet 100a of thermoplastic film from the extruder 410 contacts the roller 420 at a position 420 A
  • vacuum from the vacuum chamber 440 works on the sheet 100a through the holes 425 in the drum 421 and the perforations 432 in the molding element 430.
  • Vacuum from the vacuum chamber 440 draws the hot flat sheet 100a of thermoplastic film into the forming recesses 431 of the molding element 430 to contour the hot flat sheet 100a, and perforates the hot flat sheet 100a of thermoplastic film by extracting a portion of the thermoplastic film in the area of the perforations 432 of the molding element 430.
  • the action of the vacuum from the vacuum chamber 440 forms the thermoplastic film into a perforated contoured sheet 100b.
  • the perforated contoured sheet 100b from the roller 420 passes through drive rolls 451 and 452 to a corona treatment roller 461.
  • Tension rollers 462 and 463 contact the thermoplastic film on opposing sides of the corona treatment roller 461 to insure positive engagement of the thermoplastic film with the corona treatment roller 461 during the corona treatment process.
  • the corona treatment roller 461 is usually covered with a suitable dielectric material such as epoxy, fluorinated polyethylene (TEFLON) , chlorinated polyethylene (HYPALON) , or polyester (MYLAR) .
  • An electrode or corona bar 464 is suspended parallel to the corona treatment roller 461 at about l/l6th of an inch above the corona treatment roller 461.
  • the corona bar 464 is energized by a transformer and corona treating power source 465.
  • the energized corona bar 464 and corona treatment roller 461 will corona treat the thermoplastic film on the corona treatment roller 461 to form the corona treated, perforated contoured film 100c.
  • the corona treated, perforated contoured film 100c from the corona treatment roller 461 passes over a tension roller 470 to a take-up reel 480.
  • the film on the take-up reel 480 can be utilized as one embodiment of the perforated contoured film 100 of the present invention.
  • the perforated contoured film 100 of the present invention is preferably a polyethylene based film that exhibits superior stretch and recovery properties .
  • film is made from a multi-component blend of two major component resins that include a poly-alpha- olefin and an ethylene copolymer.
  • the major component of poly-alpha- olefin is defined as being one or more resins from the group of poly-alpha-olefins which includes resins such as an poly-alpha-olefin elastomer, an ultra low density polyethylene, a metallocene polyethylene (mPE) , or a combination thereof.
  • the major component of ethylene copolymer is defined as being one or more resins from the group of ethylene copolymers which includes resins such as an ethylene vinyl acetate (EVA) copolymer, an ethylene methyl acrylate (EMA) copolymer, an ethylene butyl acrylate (EBA) copolymer, or a combination thereof.
  • EVA ethylene vinyl acetate
  • EMA ethylene methyl acrylate
  • EBA ethylene butyl acrylate copolymer
  • the amount of each of the two major components can be varied from about 15% to about 85% while still achieving elastic performance that is superior to other polyethylene films.
  • the mixture is approximately equal amounts each of the poly-alpha-olefin elastomer, the ultra low density polyethylene, and one of the ethylene copolymers.
  • the amount of each of the two major components can be varied to accommodate the desired final properties, such as the film flexibility, texture, anufactureablity, and other attributes.
  • Other minor components such as colorants or other additives can also be added to the composition of the perforated contoured film 100.
  • the polyethylene based film of the present invention demonstrates unexpected improvements in the stretch and recovery properties over the traditional polyethylene based films.
  • Traditional polyethylene based films exhibit a 10% to 15% permanent set when extended in length by 50% to 75%.
  • a polyethylene based film of the present invention having the blend of equal amounts each of poly-alpha-olefin elastomer, ultra low density polyethylene, and one of the ethylene copolymers was shown to exhibit only a 6% to 8% permanent set when extended in length by 50% to 75%.
  • the unexpected results are believed to result form the synergism of the major components of the polyethylene film of the present invention.
  • Part of the present invention is the discovery that some adhesives do not adhere well to poly-alpha-olefin films.
  • the incorporation of alpha-olefin copolymers into the blend according to the present invention produces the unexpected result of improved adhesion of adhesives, such as acrylic-based hot melt, and pressure sensitive adhesives, to the substrate.
  • a bandage must be sterilized after the manufacturing processes.
  • Common methods of sterilizing a bandage include such methods as using an autoclave, gamma radiation, or ethylene oxide.
  • both the substrate film and the adhesive of a bandage undergo structural changes at the molecular level.
  • the ability of the adhesive to adhere to the side of the substrate film not having an adhesive coating i.e. overlap adhesion
  • Overlap adhesion depends on the materials in the substrate film, the adhesives, and the sterilization process utilized.
  • LDPE low density polyethylene
  • the process of sterilization using ethylene oxide heats the bandage up to about 180 °F.
  • the present invention includes the discovery that the use of sterilization processes utilizing ethylene oxide on bandages with substrate films having conventional low density polyethylene, causes the metal stearates in the substrate film to migrate to the surface of the film, which, in turn, decreases overlap adhesion of the bandage.
  • the present invention incorporates the use of low density polyethylene materials that have little or no metal stearates, such as metallocene polyethylene (MPE) , in place of conventional low density polyethylene. Consequently, the polyethylene based film of the present invention has better overlap adhesion after sterilization processes utilizing ethylene oxide compared to the prior art polyethylene based films. It has be found that the method illustrated in FIGS.
  • a film produced using the mixture according to Example 1 obtained the desired stretch and recovery properties of the present invention.
  • the slip and antiblocking additives in DuPont 3130SB can degrade the adhesion properties of the film. Therefore, the film produced using the mixture according to Example 1 is not as desirable in applications where adhesion properties are a factor.
  • DuPont 3130 EVA copolymer 5% Color
  • the mixture according Example 2 is similar to the mixture in Example 1, except that DuPont 3130 is used in place of DuPont 3130SB.
  • Dupont 3130 is comparable to DuPont 3130SB, except that the former does not contain slip or antiblocking agents. The result is that a film produced using the mixture according to Example 2 has better adhesion properties than a film produced using the mixture according to Example 1.
  • the component of DuPont 3124 in Example 3 is comparable to the component DuPont 3130 in Example 2; however, the former has a lower molecular weight than the latter. It was discovered that the lower molecular weight of Dupont 3124 improves the manufactureablity of the film without sacrificing desirable properties such as softness and elasticity.
  • the bandage of the present invention can be produced by first applying the adhesive 200 to the substrate film 100, and then securing the pad 300 to the combination of the substrate film 100 and adhesive 200 at a later time. Often, the combination of the substrate film 100 and the adhesive 200 are transported and stored before the pad 300 is secured to thereon, thereby subjecting the adhesive 200 to detrimental conditions before the securement of the pad 300. Therefore, in one method of forming the bandage 10, a combination is first formed of the adhesive 200 applied onto the substrate film 100 and a release liner applied to the adhesive coating 200, and later the release liner is removed prior to securing the pad 300 to the combination of the substrate film 100 and the adhesive 200. Referring now to FIG.
  • FIG. 5 there is shown a schematic diagram illustrating one method of forming a film/adhesive/release liner combination 12 of the substrate film 100, the adhesive 200, and a release liner 250 protecting the adhesive 200.
  • the film 100 from a substrate film supply (not shown) such as a roll of the substrate film 100, progresses to a perforated supporting plate 510 located below a melt blowing apparatus 520.
  • the melt blowing apparatus 520 includes a gear pump (not shown) that forces the adhesive 200 through a die 530.
  • the melt blowing apparatus 520 also has air channels 541 and 542 which have orifices 543 and 544 that are located on the same plane A-A as the die 530.
  • air 210 is forced through the air channels 541 and 542 exits the orifices 543 and 544 and engages melted adhesive 200a exiting the die 530.
  • the air 210 engaging the melted adhesive 200a causes the melted adhesive 200a to become a fiberized melted adhesive
  • the fiberized melted adhesive 200b deposits onto the film 100 supported by the support plate 510 and forms the adhesive coating 200 on the film 100, thereby creating a film/adhesive combination 11.
  • the perforations in the film 100 allow a substantial portion of the air 210 from the melt blowing apparatus 520 to pass through or obtusely deflect from the film 100, which reduces the amount of fiberized melt blown adhesive 200b that is deflected away from the film 100 or back at the die 530 and orifices 543 and 544. A reduction in the amount of fiberized melt blown adhesive 200b that is deflected away from the film
  • the release liner 250 is a material that will adhere to, and protect, the adhesive 200 from the time that the adhesive 200 is applied to the film 100 until the time that the pad 300 is applied to the combination of the adhesive/film 11.
  • the release liner 250 is a silicone coated paper or film.
  • the release liner 250 progresses from a release liner supply (not shown) , such as a roll of the release liner 250, to rollers 550 and 560.
  • the film/adhesive 11 progresses from the support plate 510 to the rollers 550 and 560.
  • the rollers 550 and 560 apply the release liner 250 onto the adhesive 200 of the film/adhesive combination 11 to form the film/adhesive/liner combination 12.
  • the film/adhesive/liner combination 12 progresses to a take-up (not shown) , such as a reel, for use later to form the bandage 10.
  • FIG. 6 there is shown a schematic diagram illustrating another method of forming the film/adhesive/release liner combination 12 of the film 100, the adhesive 200, and the release liner 250 protecting the adhesive 200.
  • the film 100 from a substrate film supply (not shown) , such as a roll of the substrate film 100, progresses over a support roller 610 to a slot die coating apparatus 620.
  • the film 100 is conveyed under a slot die 630 in the slot die coating apparatus 620.
  • the film 100 wipes off the molten adhesive 200 from the slot die 630 to coat the film 100 with the adhesive 200 and form the film/adhesive combination 11.
  • the release liner 250 progresses from a release liner supply (not shown) , such as a roll of the release liner 250, to rollers 650 and
  • the film/adhesive 11 progresses from the slot die coating apparatus 620 to the rollers 650 and 660.
  • the rollers 650 and 660 apply the release liner 250 onto the adhesive 200 of the film/adhesive combination 11 to form the film/adhesive/liner combination 12.
  • the film/adhesive/liner combination 12 progresses to a take-up (not shown) , such as a reel, for use later to form the bandage 10.
  • FIG. 7 there is shown a schematic diagram illustrating another method of forming the film/adhesive/release liner combination 12 of the film
  • the release liner 250 from a release liner supply (not shown) , such as a roll of the release liner 250, progresses over a support roller 740 to a transfer roller 760.
  • a slot die coating apparatus such as a roll of the release liner 250
  • the 720 is positioned with a slot die 730 adjacent to the release liner 250 on the transfer roller 760.
  • the release liner 250 wipes off the molten adhesive 200 from the slot die 730 to coat the release liner 250 with the adhesive 200 and form the liner/adhesive combination 14.
  • the film 100 from a substrate film supply (not shown) such as a roll of the substrate film 100, progresses over a support roller 710 to a substrate roller 750.
  • the transfer roller 760 is preferably formed of a rubber layer 761 disposed on an inner steel roller 762, and the substrate roller 750 is preferably formed of steel.
  • the rollers 750 and 760 apply the film 100 onto the adhesive 200 of the liner/adhesive combination 14 to form the film/adhesive/liner combination
  • the film/adhesive/liner combination 12 progresses to a take-up (not shown) , such as a reel, for use later to form the bandage 10. It has been found that the methods illustrated in
  • FIGS. 5, 6, and 7 can be used to produce the film/adhesive/release liner 12 according to the following examples using 40 hex VisPore from Tredegar Film Products having approximately 1,760 hole per square inch with holes having a diameter of approximately 0.3 micrometers :
  • EXAMPLE 8 A hot melt, pressure sensitive adhesive HL2306-X, from H.B. Fuller of St Paul, Minnesota, was applied to the VisPore material using the melt blown method illustrated in FIG. 5.
  • the release liner was Akrosil SBL 60 SC Silox F1U/F4B from Akrosil of Menasha, Wisconsin.
  • EXAMPLE 9 The hot melt, pressure sensitive adhesive and the release liner from Example 6 were applied to the VisPore material using the slot die coating method illustrated in FIG. 6.
  • the release liner was Eastern Paper, grade 30RFSE from Eastern Paper of Brewer, Maine.
  • EXAMPLE 11 The hot melt, pressure sensitive adhesive and the release liner from Example 8 were applied to the VisPore material using the transfer coating method illustrated in FIG. 7.
  • the release liner was Akrosil Silox BL25-MGA from Akrosil of Menasha, Wisconsin.
  • EXAMPLE 13 A hot melt, pressure sensitive adhesive HL1407-X, from H.B. Fuller of St Paul, Minnesota, was applied to the VisPore material using the transfer coating method illustrated in FIG. 7.
  • the release paper was Akrosil SBL 60 SC Silox F1U/F4B from Akrosil of Menasha, Wisconsin.
  • EXAMPLE 15 A hot melt, pressure sensitive adhesive Dura-Tak 34- 4227, from National Starch and Chemical Co. of Bridgewater, New Jersey, was applied to the VisPore material using the transfer coating method illustrated in FIG. 7.
  • the release paper was Akrosil SBL 60 SC Silox F1U/F4B from Akrosil of Menasha, Wisconsin.
  • EXAMPLE 16 A hot melt, pressure sensitive adhesive 128-3, from National Starch and Chemical Co. of Bridgewater, New Jersey, was applied to the VisPore material using the transfer coating method illustrated in FIG. 7.
  • the release paper was Akrosil SBL 60 SC Silox F1U/F4B from Akrosil of Menasha, Wisconsin.

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  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Organic Chemistry (AREA)
  • Vascular Medicine (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Materials Engineering (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials For Medical Uses (AREA)

Abstract

L'invention concerne un film constitué d'un mélange de polyéthylènes, présentant une douceur supérieure, une meilleure recouvrance après étirement et une adhésion accrue de l'adhésif, et doté de perforations situées dans des évidements. On forme un pansement à partir dudit film, en appliquant un adhésif sur une surface dudit film et en fixant un tampon sur cette même surface. Le mélange de polyéthylènes est formulé de sorte qu'il empêche la perte d'adhésion par recouvrement après que le pansement a subi le processus de stérilisation.
PCT/US1998/017307 1997-08-21 1998-08-20 Film perfore epousant les formes, a utiliser dans un pansement WO1999009090A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU92008/98A AU9200898A (en) 1997-08-21 1998-08-20 Perforated contoured film for use in a bandage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US91596497A 1997-08-21 1997-08-21
US08/915,964 1997-08-21

Publications (1)

Publication Number Publication Date
WO1999009090A1 true WO1999009090A1 (fr) 1999-02-25

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ID=25436485

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/017307 WO1999009090A1 (fr) 1997-08-21 1998-08-20 Film perfore epousant les formes, a utiliser dans un pansement

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AU (1) AU9200898A (fr)
WO (1) WO1999009090A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4351784A (en) * 1980-12-15 1982-09-28 Ethyl Corporation Corona treatment of perforated film
EP0562493A1 (fr) * 1992-03-23 1993-09-29 Viskase Corporation Film thermorétractable orienté biaxialement
EP0676183A1 (fr) * 1994-04-08 1995-10-11 JOHNSON & JOHNSON CONSUMER PRODUCTS, INC. Bandages adhésifs conformes
WO1997026850A1 (fr) * 1996-01-24 1997-07-31 Mcneil-Ppc, Inc. Tissu de renforcement pour article absorbant
WO1998002609A1 (fr) * 1996-07-15 1998-01-22 Kimberly-Clark Worldwide, Inc. Film respirant oriente de faible epaisseur et renforce par des adhesifs

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4351784A (en) * 1980-12-15 1982-09-28 Ethyl Corporation Corona treatment of perforated film
EP0562493A1 (fr) * 1992-03-23 1993-09-29 Viskase Corporation Film thermorétractable orienté biaxialement
EP0676183A1 (fr) * 1994-04-08 1995-10-11 JOHNSON & JOHNSON CONSUMER PRODUCTS, INC. Bandages adhésifs conformes
WO1997026850A1 (fr) * 1996-01-24 1997-07-31 Mcneil-Ppc, Inc. Tissu de renforcement pour article absorbant
WO1998002609A1 (fr) * 1996-07-15 1998-01-22 Kimberly-Clark Worldwide, Inc. Film respirant oriente de faible epaisseur et renforce par des adhesifs

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Publication number Publication date
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