Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/10—Open-work fabrics
  • D04B21/12—Open-work fabrics characterised by thread material
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
  • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
  • A61L15/42—Use of materials characterised by their function or physical properties
  • A61L15/64—Use of materials characterised by their function or physical properties specially adapted to be resorbable inside the body
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
  • A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
  • A61L27/58—Materials at least partially resorbable by the body
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
  • A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
  • A61L31/148—Materials at least partially resorbable by the body
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B21/06—Patterned fabrics or articles
  • D04B21/08—Patterned fabrics or articles characterised by thread material
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
  • A61F2/0063—Implantable repair or support meshes, e.g. hernia meshes
  • A61F2002/0068—Implantable repair or support meshes, e.g. hernia meshes having a special mesh pattern
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2401/00—Physical properties
  • D10B2401/10—Physical properties porous
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2403/00—Details of fabric structure established in the fabric forming process
  • D10B2403/03—Shape features
  • D10B2403/033—Three dimensional fabric, e.g. forming or comprising cavities in or protrusions from the basic planar configuration, or deviations from the cylindrical shape as generally imposed by the fabric forming process
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2509/00—Medical; Hygiene
  • D10B2509/02—Bandages, dressings or absorbent pads
  • D10B2509/022—Wound dressings
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2509/00—Medical; Hygiene
  • D10B2509/08—Hernia repair mesh

Definitions

• the present invention relates to a knitted textile structure having differentiated zones, more particularly in terms of the dimensions of the openings that it comprises, in terms of density, or even in terms of physicochemical characteristics. It is particularly applicable in the medical field, and more in the field of producing dressings intended to cover a wound or scar. It is also applicable in implants or in areas of mechanical stress or composites of parts in three dimensions.
• the textile constituting the dressing must be peel-and-open, the size of the pores or openings, defined by the calculation of the percentage of opening area by relative to the total area, being controlled to facilitate the transport of exudates out of the wound, often towards an absorbent layer.
• the size of the pores is adapted to the healing phase, the larger pores being used at the beginning of healing. Then, as and when the healing progresses, the pore size decreases, in order to respect the fleshy bud constituting an essential element of said healing.
• the surface of the textile in contact with the wound must be smooth and non-adherent, in order to avoid tearing of the healing zone at the time of the change of dressing.
• the dressings made of complex composites such as for example described in the document WO 2006/044882, are capable of comprising an absorbent layer and / or a compressive layer, associated with an adhesive support intended to maintain the dressing on the surface. skin, but also to provide a wound protection function against the external environment.
• One of the objectives of the invention is to provide a knitted textile structure, obtained by the mesh technology discarded on a warp, Rachel or hook, obtained in a single step, fundamentally aimed at defining differentiated areas.
• This knitted textile structure comprises a central zone delimited by a peripheral zone, said zones having different densities and / or different mechanical characteristics.
• the invention consists in producing, in a single step, by the jersey knitting technology, in particular on a warp, Rachel or crochet, a knitted textile structure defining different zones intended to perform functions according to the invention. themselves different.
• the respectively central and peripheral zones also have different conformational possibilities, that is to say are likely to adopt a non-planar shape.
• the central zone is likely to adopt a curved shape, even though the peripheral zone is flat. This differentiation is obtained on the knitting machine by acting on the absorbed son length, that is to say supercharging the armor implemented, thereby generating a surplus of textile structure that can then be deformed.
• the central zone defines apertures larger than those of the peripheral zone or zones, and typically between 50 micrometers and 5 millimeters, even though the peripheral zone has openings of dimensions typically between 25 micrometers and 3 millimeters.
• the cicatrization phenomenon and in particular the exudates out of so-called exudative wounds, is favored.
• This central zone can adopt any shape, including square, rectangle, oval, or other.
• the central zone may be made of anti-adhesion material, and for example silicone-wrapped PET (polyethylene terephthalate); but it can also be made of absorbable materials, including bioresrobables, such as PLA (poly lactic acid), PLG (polyglycolic acid), PCL (polycaprolactone), chitosan.
• bioresrobables such as PLA (poly lactic acid), PLG (polyglycolic acid), PCL (polycaprolactone), chitosan.
• the peripheral zone is advantageously made of a material chosen from the group comprising: polyamide, polyether terephthalate (PET), polyethylene, polypropylene, PEEK (polyetheretherketone), mineral fibers (glass, basalt), but also of materials bioabsorbable of the type previously mentioned in relation to the central zone.
• the peripheral zone receives on one of its faces an adhesive film, preferentially by laminating or thermo-bonding, intended to ensure the joining of the dressing on the surface. skin of a patient.
• the textile structure in the form of a sheet, defining a plurality of elementary structures, that is to say structures comprising a central zone associated with a peripheral zone.
• a sheet resulting from the knitting machine is then cut according to the needs.
• the central zone consists mainly of non-absorbable materials in order to ensure the permanent and constant effect over time, and thus to provide the desired reinforcement function, while that the peripheral area is, for its part, made mainly of absorbable materials, in particular to facilitate the grip and pause.
• the density is greater in the peripheral zone than in the central zone, in order to ensure the mechanical properties of the structure.
• the textile structure of the invention is capable of having an elongation extension capacity, in particular along the two directions of the plane in which it fits, typically between 5 and 170%.
• This variation of elongation capacity can result from the armor implemented. Such a variation in elongation capacity may be advantageous for composite applications, thus allowing the structure to be adapted to complex shapes.
• the textile structure of the invention may also further comprise a layer made of a woven, knitted or non-woven material, or even a film. This layer is secured to the structure directly on the knitting machine, in this case a Rachel trade.
• an absorbent layer for example of the foam type, capable of containing the exudates, this , and again, in one step.
• Figure 1 is a schematic representation of the knitted textile structure according to the invention implementing an elementary cell.
• FIG. 2 is a diagrammatic representation of a sheet coming from a knitting machine, incorporating a plurality of these elementary cells.
• Figure 3 is a schematic representation illustrating the various son and armor implemented according to a first embodiment of the invention.
• Figure 4 is a view similar to Figure 3 of a second embodiment of the invention.
• the knitted textile structure of the invention basically comprises two zones, a central zone (101) delimited by a peripheral zone (102).
• these two zones have different densities. This variation in densities can result from a variation in the dimensions of the openings or pores of the respective zones.
• the central zone as can be seen in Figures 1 and 2, has openings larger than the peripheral zone Corollary it also has a lower density than the peripheral zone.
• the dimensions of the openings of the central zone may be between 50 micrometers and 5 millimeters, even though those of the openings of the peripheral zone may be between 25 micrometers and 3 millimeters.
• This knitted textile structure is obtained in a single step, using the so-called mesh technology thrown on a loom chain, Rachel or hook.
• the five bars can operate according to the following design:
• a first bar is a barbell
• a second bar feeds a capstan wire to ensure the mechanical properties
• a third bar provides a total frame, necessary for the cohesion of the whole.
• the first is to hide the son intended to constitute the central zone, either by an introduction in capstan, or by an armor allowing to introduce straight threads, that is to say oriented production direction, without they stand out on the surface of the textile, such as for example in string armor,
• the second consists in allowing the wires in question to leave the structure, that is to say leaving them free at the exit of the knitting members, these threads being found in the peripheral zone in floating form, and are then cut after completion of the structure.
• the realization of the central zone is then carried out as follows by way of example: two of the bars mesh and the armor is adapted to the geometry of the pores, in particular according to the desired shape and dimensions, such as for example by setting implement a net armor.
• the other three bars provide an armor so as to hide these son in the structure, either by capstan introduction, or by an armor that allows to introduce the straight son without they emerge from the surface of the textile, such as for example chain type.
• the shape and the size of the openings, in particular of the central zone are played according to:
• FIG. 2 shows a textile ply (200) derived from a knitting machine operating according to the jet knit technology, of the chain, Rachel or hook type, and defining a plurality of elementary ones each integrating a central zone. (201) and a peripheral area (202). Such a sheet may then be cut, precisely to obtain said elementary structures.
• FIG. 3 is thus an exemplary embodiment of the invention with bindings offering a method of construction typically adapted to the dressing function.
• lengths respectively identified by A and B are distinguished, which can be different and adapted to the types of wounds to be treated, and generally to the desired size of the central zone.
• intersecting areas A and C define the central areas of the structure of the invention.
• the zone D therefore limitingly constitutive of a part of the peripheral zones, consists of wires (301) working in a chain with wires (302), which work in sectional frame, so as to obtain a structured zone, fairly solid, that is to say, fairly mechanically resistant.
• these son are made of polyester, whose mechanical strength is known, and moreover, biocompatible and therefore likely to be implemented for medical applications.
• zones C specific threads (304, 305), such as silicone-coated polyethylene terephthalate (PET) are used, said yarns working in "cellular” weave or armor or in atlas, that is, that is to say armor to mesh diagonally evolving on different columns or needles of the knitting machine to create effects of "days", this on two or more rows to create the days or openings, and so for create a certain relief of this part at the same time to conceal the other son (301, 302) compared to the background binding, necessary for the cohesion of the structure.
• PET silicone-coated polyethylene terephthalate
• wires (303, which remain in capstan, therefore very discrete in zone A, will work in sectional weft in zone B to reinforce the mechanical cohesion of the textile structure.
• the particular wires (304, 305) made in Silicone-wrapped PETs are in turn concealed in the cape-shaped zone B (thus substantially straight), that is to say in a substantially straight structure so as to be hidden and without surface contact.
• embodiment of Figure 4 it is also possible to provide the appropriate release son son (404, 405) of Part B.

Landscapes

• Health & Medical Sciences (AREA)
• Veterinary Medicine (AREA)
• Public Health (AREA)
• Epidemiology (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Dermatology (AREA)
• Medicinal Chemistry (AREA)
• Materials Engineering (AREA)
• Transplantation (AREA)
• Heart & Thoracic Surgery (AREA)
• Surgery (AREA)
• Vascular Medicine (AREA)
• Hematology (AREA)
• Knitting Of Fabric (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=53758380

Family Applications (1)

Country Status (3)

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Family Cites Families (7)

• 2015
  • 2015-04-30 FR FR1553918A patent/FR3035666B1/fr active Active
• 2016
  • 2016-04-29 EP EP16733629.6A patent/EP3289130A1/de not_active Withdrawn
  • 2016-04-29 WO PCT/FR2016/051014 patent/WO2016174369A1/fr active Application Filing

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