EP1164997A1 - Procede de fabrication d'une feuille de protection de surface adhesive comportant une languette de saisie - Google Patents

Procede de fabrication d'une feuille de protection de surface adhesive comportant une languette de saisie

Info

Publication number
EP1164997A1
EP1164997A1 EP99963718A EP99963718A EP1164997A1 EP 1164997 A1 EP1164997 A1 EP 1164997A1 EP 99963718 A EP99963718 A EP 99963718A EP 99963718 A EP99963718 A EP 99963718A EP 1164997 A1 EP1164997 A1 EP 1164997A1
Authority
EP
European Patent Office
Prior art keywords
web
strip
protective layer
layer
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.)
Withdrawn
Application number
EP99963718A
Other languages
German (de)
English (en)
Inventor
Ulf Johannison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Molnycke Health Care AB
Original Assignee
Molnycke Health Care AB
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 Molnycke Health Care AB filed Critical Molnycke Health Care AB
Publication of EP1164997A1 publication Critical patent/EP1164997A1/fr
Withdrawn legal-status Critical Current

Links

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
    • A61F13/15577—Apparatus or processes for manufacturing
    • A61F13/15756—Applying tabs, strips, tapes, loops; Knotting the ends of 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
    • A61F13/02—Adhesive bandages or dressings
    • A61F13/023—Adhesive bandages or dressings wound covering film layers without a fluid retention layer
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/403—Adhesives in the form of films or foils characterised by release liners characterised by the structure of the release feature
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/18—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet characterized by perforations in the adhesive tape

Definitions

  • the present invention relates to a method of producing an adhesive surface protective layer that includes a gripping tab and of fastening the protective layer to a product, and also to an arrangement for carrying out the method, and to a product produced in accordance with the method.
  • Wound dressings and so-called surgical plasters are often provided with an outer adhesive layer that enables the dressing to be fastened to the skin of a user.
  • the adhesive coating of such dressings is protected by a protective layer, for instance a layer of so-called release paper, partly to facilitate handling of the dressing prior to use and partly to prevent dust and other contaminants fastening to the adhesive coating and partly to prevent the adhesive from drying-out.
  • release layers can be easily peeled away from the adhesive coating without impairing its adhesive properties and, for this reason. are produced from material that has poor adhesion to the adhesive or from a material that has been treated with a release agent, such as silicone-coated paper or silicone-coated plastic foil.
  • the release layer is comprised of two mutually overlapping parts which can each be removed from the dressing prior to its application. In order to facilitate removal of that part of the mutually overlapping portions of the release layer which lies nearest to the adhesive coating, it is often folded so as to provide a gripping tab that can be gripped by the user when the outermost part of said two overlapping parts of the gripping foil has been removed.
  • An object of the present invention is to eliminate or at least substantially reduce the need to store release foils of several different sizes.
  • Another object of the invention is to eliminate or at least greatly reduce this danger.
  • a third object of the invention is to increase the flexibility of release foil and other types of protective layers for products that include an outer adhesive coating and also to simplify application of such foils and products.
  • adhesive coating all types of adhesive surfaces that need to be protected by removable protective layers, and then particularly all adhesive surfaces used with wound dressings, for instance acrylate glue and soft, sticky elastomers.
  • two or more strips are fastened to the protective layer and the elongate join and its associated weakening line are produced by ultrasound welding.
  • the elongate join in each strip is produced by gluing, and the associated weakening line is produced by punching.
  • the invention also relates to a method applied in the continuous manufacture of products that include an outer adhesive layer for providing said adhesive layer with a protective layer that includes a gripping tab, wherein the product blanks are formed on a travelling web of material, characterised by mounting to at least one strip of material a protective layer that has the same width as the travelling product-blank web, fastening each strip to the protective layer along an elongate join and providing a weakening line in said join, and thereafter mounting the protective layer with its associated strips and cutting the finished products from the travelling product-blank web.
  • the invention also relates to an arrangement for manufacturing adhesive surface protective layers that include a gripping tab, said arrangement being characterised by means for mounting at least one elongate strip of material on the protective layer, means for fastening each strip to the protective layer along an elongate join, and means for providing a weakening line in each join.
  • the invention also relates to an arrangement for producing products that include an adhesive layer protective layer which has a gripping tab with a starting point from a travelling web of product blanks that include an outer adhesive layer, said arrangement being characterised in that it includes a protective layer web which has the same width as the product-blank web and which is reeled-up on a storage reel, at least one web of striplike material reeled-up on a storage reel, a rotatable roller which extends transversely to the direction of movement of said product-blank web across the full width of said web, wherein the protective-layer web and each web of strip-like material move around said roller with the web or webs of strip-like material situated between the roller and the protective-layer web, and wherein said arrangement further includes means for pressing the protective-layer web into abutment with the adhesive layer on the product-blank web, means for fastening each web of strip material to the protective layer along a longitudinally extending join prior to bringing said protective layer into abutment with the product-blan
  • the means for fastening each web of strip material to the protective layer and for producing a weakening line in the established join comprise the ultrasound horn of an ultrasound welding unit and an anvil surface provided on the roller, said anvil surface having the form of a bead that extends parallel with the direction in which the product-blank web moves around the periphery of said roll.
  • at least two devices for fastening a web of strip material to the protective layer are disposed along the length of the roll, said fastener devices being moveable in the length direction of the roller and said roller including along its length a plurality of anvil surfaces with which the fastener devices can electively coact.
  • the invention also relates to a product that includes an outer adhesive surface and a peelable protective layer fastened to said surface and including a gripping tab, wherein said product is characterised in that an elongate strip of material extends over the protective layer from one end of the product to its opposite end; in that the strip is fastened to the protective layer by a join that extends between said ends of said product in spaced relationship with both long edges of the strip; and in that a weakening line extends in the join from one end to the other end thereof.
  • the weakening line is continuous and extends depth-wise through the strip.
  • the weakening line is intermittent in one variant of the invention.
  • FIG. 1 is a schematic, perspective view of one embodiment of an inventive an arrangement for producing a protective layer that includes a gripping tab and for fastening said layer to an outer adhesive layer on a web of material;
  • Fig. 2 is a schematic, perspective view of a dressing provided with a protective layer in accordance with the invention
  • Fig. 3 is a cross-sectional view of that part of the dressing in Figure 2 which includes said gripping tab;
  • Fig. 4 is a schematic view similar to the view of Figure 3 and shows a known dressing which has been provided with mutually overlapping release foils in a known manner.
  • Figure 1 is a schematic illustration of an arrangement 1 for producing and fastening a protective layer that includes a gripping tab to an underlying, travelling web of material 2 which has an upwardly facing adhesive layer 3.
  • the web 2 is moved in the direction of the arrow A in some suitable manner, e.g. with the aid of a belt conveyor or some like means.
  • the arrangement 1 includes a web 4 of protective layer material rolled-up on a storage reel 5, and one or more webs 6 of strip material rolled-up on storage reels 7.
  • the protective- layer web 4 and the webs 6 of strip material run around a part of the periphery of a rotatable roller 8 with the webs 6 lying inwardly of the web 4 relative to the roller and with said webs 6 mutually separated in the axial direction of the roller.
  • the protective-layer web 4 has the same width as the travelling web 2 and extends parallel to said web. In the case of the illustrated embodiment, two webs 6 of strip material are disposed in spaced relationship with the longitudinal edges of the web 4.
  • the roller 8 carries a circumferentially extending bead 9 at the location of each web 6 of strip material, said bead being spaced from the longitudinal edges of its associated web 6.
  • An ultrasound horn 10 included in an ultrasound welding unit (not shown) is arranged opposite each bead 9, and the web 4 of protective layer material and the webs 6 of strip material run between the horn 10 and the beads 9.
  • the roller 8 is mounted at a distance from the travelling web 2 such that the protective layer 4 will come into abutment with the upper adhesive surface 3 of the travelling web subsequent to the protective layer 4 having passed the horn 10.
  • the arrangement 1 operates in the following way.
  • the web 4 of protective layer material is fed from the storage reel 5 in an appropriate fashion and applied to the travelling web 2 with the aid of the roller 8. the peripheral speed of which coincides with the running speed of the web 2.
  • the web 4 can be advanced either by driving the roller 8 or the storage reel 5 or by driving both roller and reel.
  • a pair of rolls can be placed downstream of the roller 8 in the direction of web movement and adapted to effect the advancement of both the travelling web 2 and the web 4 of protective layer material. In this case, it may be suitable to space the roller 8 at a greater distance from the web 2 and to allow the downstream pair of rolls to press the web 4 against the adhesive layer 3 on the upper surface of the web 2.
  • the webs 6 of strip material are fed from the storage reels 7 in a similar manner. Feeding of the web 4 of protective layer material and the web 6 of strip material is suitably designed to ensure that these webs will be stretched slightly as they are advanced.
  • the beads 9 function as anvil surfaces for the ultrasound horn 10 and are effective in welding the web 6 of strip material to the web 4 of protective layer material as the webs pass the horn 10, therewith producing a longitudinally extending or elongate weld join 1 1.
  • the beads are also constructed to produce a weakening line in the centre of the join 11.
  • FIGS. 2 and 3 illustrate an example of a finished product 12 cut from the web 2.
  • the various layers in the product have been identified with the same reference signs as those used to identify the webs in Figure 1.
  • the product 12 thus comprises a part which has been cut from the web 2, and a protective layer 4 which has a strip 6 fastened thereto by a join 11 and which is located on the adhesive layer 3 on the part cut from said web 2.
  • Those parts 16, 17 of the strip 6 situated on respective sides of the join 1 1 form gripping tabs.
  • the ultrasound welding operation is effected so as to obtain a weakening line 18 that extends along the centre of the join.
  • a user grips the gripping tabs 16, 17 in order to remove one or both protective layers only a small force is required to peel away the protective layer 4 along the weakening line 18.
  • the adhesive surface of the product 12 can be applied to the place intended.
  • the product illustrated in Figures 2 and 3 may, for instance, be a wound dressing that in addition to the adhesive layer 3 includes a layer 19 of absorbent foam material, e.g. polyurethane foam, and a layer 20 of liquid- impermeable but vapour-permeable material, such as polyurethane film, for instance.
  • the layer 3 may consist of a layer of soft, sticky elastomeric material, for instance silicone gel, and the protective layer 4 and the tabs 16, 17 may consist of polypropylene film.
  • the tabs 16, 17 need not be comprised of the same material as the protective layer 4, although they shall, of course, be made of a weldable material so that a weakening line 18 can be obtained in the ultrasound welding process.
  • the weakening line 18 will preferably have a depth that is at least greater than half the thickness of the tabs and the weakening will preferably extend through the tab material 6 and into the protective layer 4 so that the protective layer 4 can be easily removed from the adhesive layer 3.
  • the weakening line may extend through both the strip 6 and the protective layer 4, although this alternative is not preferred for those reasons made apparent in the following text.
  • FIG 4 is a schematic illustration of a known dressing that includes mutually overlapping release foils 21, 22.
  • the overlap part of the bottom release foil 21 has a folded edge so as to form a gripping tab.
  • a gap 23 will form between the overlapping release foil 22 and the release foil 21. This gap can cause the adhesive to dry out in the region of said gap and therewith impair the properties of the adhesive. This risk is particularly great in dressings that have a three-dimensional surface profile, for instance a dressing that includes a central wound pad.
  • the weakening lines may alternatively consist of perforations since any impairment to the adhesion of the adhesive in the perforations will be local, so that no continuous region of poor adhesion will occur.
  • a protective layer that consists of polypropylene film having a thickness of 100 ⁇ m and a strip comprising polypropylene film having a thickness of 100 ⁇ m can be provided with a tight and easily opened weakening line with the aid of a bead that has a semi-circular cross-section and a radius of 0.5 mm as an anvil surface for coaction with the horn of an ultrasound unit of the type 20kHZ DCP 2200 from Dukane, USA.
  • the described arrangement is constructed to produce from the travelling product-blank web 2 products that have a width corresponding to half the width of the web 2.
  • this can be achieved very easily by fastening the requisite number of strips 6 on the web 4 of protective layer material.
  • the ultrasound unit and the storage reels 7 carrying the strip material may be supported for movement along the roller 8 with the aid of some suitable mechanism.
  • the roller 8 may be provided along its length with a plurality of beads 9 which are situated to correspond to the various widths of all products that are included in the assortment produced by cutting said products from a travelling product-blank web. This will enable the arrangement 1 to be quickly adjusted, by moving the ultrasound welding units and the storage reels 7 transversely to a position opposite those beads that are applicable to the products that shall be cut from the product-blank web 2. Naturally, an ultrasound unit may be arranged opposite each such bead while activating solely those units that shall coact with the selected beads.
  • the grip-tab strips are fastened in conjunction with mounting the protective layer 4 to the travelling product-blank web 2.
  • a protective layer that includes gripping tabs before mounting said protective layer 4, for instance when the grip-tab strips extend transversely to the direction of movement of the protective layer and therewith applied by an intermittent process.
  • the weakening lines may, of course, not be through-penetrating in such a process.
  • Ultrasound welding is applied in the described embodiment to produce a join and a weakening line in the centre of said join in one and the same operation.
  • the attachment can be achieved with a heat welding process or gluing process and the weakening lines can be produced with conventional methods, such as punching or the like.
  • attachment of the strips and production of the weakening lines may be effected in different stages.
  • the joins are preferably made after the weakening lines have been produced.
  • protective layers and strips need not consist of heat weldable material and all materials that are now- used as release materials may be used instead.
  • a further advantage afforded by the described method is that protective layer material and strip material need only be stored in one single width which greatly facilitates storage and handling of these materials in respect of adjusting the process line to the manufacture of new products.
  • the adhesive may be an acrylate glue and plastic material other than polypropylene may be used as release film, e.g. polyethylene.
  • the invention is therefore limited solely by the contents of the accompanying Claims.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Manufacturing & Machinery (AREA)
  • Epidemiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Adhesive Tapes (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Adhesives Or Adhesive Processes (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une couche de protection de surface adhésive comportant des languettes de saisie. Le procédé selon l'invention consiste à appliquer au moins une bande de matière (6) sur la couche (4) de protection et à fixer chaque bande (6) à la couche (4) au moyen d'une attache (11) allongée, une ligne de déchirure étant pratiquée dans chaque attache allongée. L'invention décrit également un produit comprenant une couche de protection dotée de languettes de saisie selon l'invention.
EP99963718A 1998-12-09 1999-11-19 Procede de fabrication d'une feuille de protection de surface adhesive comportant une languette de saisie Withdrawn EP1164997A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9804268 1998-12-09
SE9804268A SE9804268L (sv) 1998-12-09 1998-12-09 Förfarande för att tillverka ett greppflikförsett skyddsskikt för adhesiva ytor
PCT/SE1999/002129 WO2000033776A1 (fr) 1998-12-09 1999-11-19 Procede de fabrication d'une feuille de protection de surface adhesive comportant une languette de saisie

Publications (1)

Publication Number Publication Date
EP1164997A1 true EP1164997A1 (fr) 2002-01-02

Family

ID=20413608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99963718A Withdrawn EP1164997A1 (fr) 1998-12-09 1999-11-19 Procede de fabrication d'une feuille de protection de surface adhesive comportant une languette de saisie

Country Status (7)

Country Link
EP (1) EP1164997A1 (fr)
JP (1) JP2002531221A (fr)
CN (1) CN1333672A (fr)
CA (1) CA2348854A1 (fr)
PL (1) PL348510A1 (fr)
SE (1) SE9804268L (fr)
WO (1) WO2000033776A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE518197C2 (sv) * 2000-12-08 2002-09-10 Sca Hygiene Prod Ab Absorberande artikel med greppflik i skyddsskiktet
DE10312452B4 (de) * 2003-03-20 2014-12-24 Lohmann & Rauscher Gmbh & Co. Kg Verfahren zum Herstellen eines Wundversorgungsproduktes
CN102573721B (zh) 2009-09-30 2015-09-09 莫恩里克保健公司 将把持条附着于膜敷料载体层上的方法
CA2777676C (fr) * 2009-10-14 2015-06-23 Kiyotaka Takada Procede et dispositif pour la production de timbre adhesif
USD686735S1 (en) 2010-05-28 2013-07-23 Hisamitsu Pharmaceutical Co., Inc Medical patch
USD698928S1 (en) 2010-11-05 2014-02-04 Hisamitsu Pharmaceutical Co., Inc. Medical patch
EP2805698B1 (fr) * 2013-05-22 2018-04-04 Adhex Technologies Pansement pour plaie

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2128479A (en) * 1982-10-20 1984-05-02 Smith & Nephew Ass Application of surgical dressings
EP0168174A1 (fr) * 1984-06-13 1986-01-15 Smith & Nephew Inc. Pansement sous forme de film
US5052381A (en) * 1990-03-19 1991-10-01 The B. F. Goodrich Company Adhesive wound dressing and perforated shield
JP3247918B2 (ja) * 1993-06-18 2002-01-21 株式会社共和 医療用絆創膏及びその施用方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0033776A1 *

Also Published As

Publication number Publication date
SE512530C2 (sv) 2000-03-27
CA2348854A1 (fr) 2000-06-15
PL348510A1 (en) 2002-05-20
SE9804268L (sv) 2000-03-27
CN1333672A (zh) 2002-01-30
SE9804268D0 (sv) 1998-12-09
JP2002531221A (ja) 2002-09-24
WO2000033776A1 (fr) 2000-06-15

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