EP1896637B1 - Unravelable knit fabric - Google Patents

Unravelable knit fabric Download PDF

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Publication number
EP1896637B1
EP1896637B1 EP06755444.4A EP06755444A EP1896637B1 EP 1896637 B1 EP1896637 B1 EP 1896637B1 EP 06755444 A EP06755444 A EP 06755444A EP 1896637 B1 EP1896637 B1 EP 1896637B1
Authority
EP
European Patent Office
Prior art keywords
meshing
yarns
sheet
knit fabric
warp
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.)
Not-in-force
Application number
EP06755444.4A
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German (de)
French (fr)
Other versions
EP1896637A2 (en
Inventor
Alfredo Meneghin
Michel Therin
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.)
Sofradim Production SAS
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Sofradim Production SAS
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Publication date
Application filed by Sofradim Production SAS filed Critical Sofradim Production SAS
Publication of EP1896637A2 publication Critical patent/EP1896637A2/en
Application granted granted Critical
Publication of EP1896637B1 publication Critical patent/EP1896637B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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    • 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
    • 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 prosthetic knit having demountable areas allowing the easy separation of strips or knit strips in the direction of knitting. These strips or strips can be used as textile medical devices, implantable in the human body or not.
  • non-implantable textile devices mention may be made of compresses, textile holding tapes, etc.
  • textile prostheses in general such as wall reinforcements for example in surgery parietal, urethral support strips in the treatment of stress incontinence in women, as well as in the treatment of disorders of pelvic statics mainly in women in general, also called prolapse.
  • These textile prostheses must therefore have a certain dimensional stability. To do this, these textile prostheses are usually subjected to a heat-setting step which increases their dimensional stability. Prostheses are then more easily manipulated.
  • these support implants must be able to be cut into narrow strips of the order of 1 cm in long lengths, for example of the order of 50 cm, without disbanding or tiling.
  • tilt is meant, in the sense of the present application, the spontaneous winding of the strip on itself, around its longitudinal axis, under tension stress along its length.
  • These implants must retain in this form mechanical properties, including resistance, sufficient, while minimizing the release of particles, that is to say son ends, when they are under stress.
  • these implants must also allow mechanically stable tissue anchoring.
  • a problem posed by the cutting process lies in the fact that the edges of the implants are frayed. There is then a release of particles especially in the case of stress elongation and thus the loss of son.
  • the cut macroporous elastic implants are difficult to use without protective sheath. Indeed, because of their elasticity and their non-smooth edges, these implants cling to the patient's tissue at the risk of forming a rasp in case of a sharp turn, they deform, tile and release particles. This is why they are generally proposed in a protective sheath, which complicates and increases the surgical operation.
  • the document FR 2,453,231 describes a method of making several laces assembled to each other by broaching son.
  • EP 1 382 728 A1 discloses a prosthetic knit made on a hook loom.
  • the present invention aims to remedy this need by proposing a knit fabric having demountable zones allowing easy separation, in the direction of manufacture of the knit fabric, of strips or strips of knit fabric, in particular macroporous, and made from monofilament of biocompatible material. , in particular by eliminating one or more specific catenary yarns, the elimination of said one or more yarns enabling the separation of said knit into strips with smooth edges and without risk of fraying.
  • the present invention relates to a knit according to claims 9 or 10.
  • This knit preferably prosthetic and perforated, made of a single piece, based on an arrangement consisting of at least two sheets of son, preferably a biocompatible polymeric material, comprising at least a first ply defining a first chain weave and at least one or more non-meshing plies, of partial weft, each of these non-weaving plies defining an armor, characterized in that it comprises at least one yarn of said free chain, a free warp thread being defined by a warp thread for which, over the entire longitudinal dimension of the knit, any thread of said non-meshing plies approaching said free warp thread makes a half turn at the level of of this free chain thread.
  • the present invention also relates to the use of a knit as above to obtain a textile medical device, in particular a prosthetic product for surgical use, in particular to obtain a support implant for the treatment of urinary incontinence. effort and / or prolapse.
  • Another object of the invention is a textile medical device, characterized in that it is obtained by demisting at least two free, preferably consecutive, chain yarns of a knit such as above, preferably on the length of the longitudinal dimension of said knit.
  • the knit according to the invention makes it possible to produce a large number of homogeneous strips, in particular thermofixed homogeneously.
  • the knit according to the invention preferably made in large width, for example over a width ranging from 1.2 to 1.5 meters, is easily manipulated and therefore thermofixable.
  • the thermofixation performed on a piece of large width is particularly homogeneous, and textile medical devices, in particular implants, obtained from this knit, in the form of strips separated by unraveling free warp threads, are also homogeneous and reproducible.
  • the textile medical device, in particular the support implant, according to the invention has excellent tensile strength, may be inelastic, and is thus quite suitable for the manufacture of a support implant for the treatment of urinary stress incontinence and prolapse, without the need for a protective sheath.
  • the textile medical device according to the invention has atraumatic and stable smooth edges, that is to say without risk of fraying or release of particles.
  • all textile medical devices, in particular all strips or implants, obtained from the same knit according to the invention have a homogeneous thermofixation and are easily manipulated.
  • prosthetic knit means a knit intended to be implanted in the human or animal body in the form of a prosthesis or of any other piece shaped at least in part with said knit.
  • openwork knit means a knit whose armor or armor determine cells or voids in the thickness of the knit, these cells or voids may constitute channels opening on either side knitting.
  • Such openwork knit also called macroporous, allows better tissue integration.
  • mesh tablecloth is meant according to the present application, a sheet of son for which the scale followed for the knitting son leads to the formation of meshes.
  • a chain-weave web is a mesh web, while partial weft webs are non-mesh webs.
  • free warp thread means a warp thread completely traversed by any weft yarn, in other words a warp yarn for which any weft yarn approaching and interacting with this warp yarn, for example by bonding with it, then performs a half-turn at this string, and this over the entire longitudinal dimension of the knit.
  • the knit comprises at least one percent of free warp threads spaced regularly or not according to the transverse dimension of the knit.
  • the knit comprises at least ten percent of free warp threads spaced evenly along the transverse dimension of the knit.
  • the knit according to the invention comprises a non-meshing tablecloth having the following scale: 0-0 / 2-2 //.
  • the knit according to the invention comprises at least two non-meshing plies.
  • the presence of two non-meshing plies, in particular two non-meshing plies crossing one another, that is to say whose respective guide bars move symmetrically with respect to one another, shifted one by relationship to the other in the direction of the manufacture of knitting on the knitting machine allows to obtain strips and / or implants having a very good resistance to lateral compression.
  • this textile medical device in particular this strip and / or implant, keeps significantly the same width.
  • the width loss of a medical device, in particular a strip and / or implant, according to the invention under the effect of the compression of its two opposite longitudinal edges between two fingers is less than 10%.
  • the medical devices, in particular the strips and / or implants, according to the invention are therefore particularly stable in handling, in passing in possible ancillaries (needle eye, cannula ...) and in the tissues of the patient (limitation of the rope effect).
  • the knit comprises a first non-knit web and a second non-knit web, said first non-knit web having the table 1-1 / 3-3 / 2-2 / 0-0 // said second non-meshing web having the scale 3-3 / 2-2 / 0-0 / 1-1 //.
  • the distance between said free warp threads, according to the transverse dimension of the knit is from 0.5 cm to 2 cm, preferably from 0.5 cm to 1.5 cm.
  • the knit according to the invention is a prosthetic knit.
  • the knit is made based son, monofilaments or multifilament, a biocompatible polymer material selected from polypropylene, polyester, polyamide and mixtures thereof.
  • said biocompatible polymer material is polypropylene.
  • the knit according to the invention is made from yarns, monofilaments or multifilaments, of a biocompatible and bioabsorbable polymer material.
  • the knit according to the invention is made from a mixture of bioabsorbable biocompatible yarns and nonabsorbable biocompatible yarns.
  • the knit according to the invention is made from monofilament yarns having a diameter ranging from 0.05 mm to 0.15 mm, preferably from approximately 0.10 mm.
  • the knit according to the invention has a thickness ranging from 0.20 mm to 0.40 mm, preferably around 0.30 mm.
  • the knit according to the invention is a perforated knit.
  • the knit according to the invention comprises cavities having a diameter ranging from 0.3 to 1.5 mm, preferably ranging from 0.3 to 0.9 mm.
  • Such a knit makes it possible to manufacture a support implant having good tissue anchoring.
  • the knit according to the invention is heat set.
  • the textile medical device according to the invention has a width ranging from 0.5 cm to 2 cm, preferably ranging from 0.5 cm to 1.5 cm.
  • the weight per unit area of the textile medical device according to the invention ranges from 40 to 100 g / m 2 , preferably from 50 to 75 g / m 2 , and more preferably from 50 to 60 g / m 2 .
  • the textile medical device according to the invention has a thickness ranging from 0.20 mm to 0.40 mm, preferably about 0.30 mm.
  • the textile medical device according to the invention comprises cells having a diameter ranging from 0.3 to 1.5 mm, preferably ranging from 0.3 to 0.9 mm.
  • the breaking force in the longitudinal and transverse direction of the textile medical device according to the invention ranges from 20 to 90 N, preferably from 40 to 90 N, preferably from 55 to 75 N, more preferably 60 to 70 N.
  • the textile medical device according to the invention has both excellent mechanical strength, or breaking strength, and a low surface mass.
  • Such a textile medical device is particularly advantageous as a support implant because it makes it possible to obtain effective support for the organs to be treated while minimizing the mass of implanted foreign bodies.
  • the elongation under 2 daN in the longitudinal direction of the textile medical device according to the invention is less than or equal to 15%, more preferably less than or equal to 10%.
  • Such a textile medical device is therefore particularly dimensionally stable.
  • the textile medical device according to the invention is prosthetic and perforated and constitutes a support implant for the treatment of stress urinary incontinence and / or prolapse.
  • the textile medical device according to the invention preferably corresponds to a zone of the knit according to the invention comprised between two consecutive loose chain yarns, it does not include free warp threads. It does not present any risk of unraveling.
  • the knit according to the invention is manufactured according to a process comprising the following step manufacturing a knit on a warp or Rachel loom according to a first ply and one or more non-meshing plies, said first ply being threaded continuously or at disposal and being obtained from a guide bar, the scale followed for knitting the yarns of said first ply leading to the formation of a chain, said non-meshing plies being threaded continuously or at disposal, each of said non-meshing plies being obtained from a bar with gauges, the scale followed for the knitting of the threads of each non-meshing sheet being such that for at least one yarn of the chain armor, called free chain yarn, taken in the direction of manufacture of the knitted fabric, any yarn of said nonwovens meshing approaching said free chain thread performs a half-turn at this free chain thread.
  • the scale followed for the knitting of the yarns of each non-meshing web is such that for at least one percent, preferably at least ten percent, of the warp armor threads, known as free warp threads, taken in the direction of manufacture of the knit, any thread of said non-meshing plies approaching said free warp threads performs a half-turn at these free warp threads.
  • a single non-meshing web is used, the threads of the first ply according to a chain-weave being knitted according to a scale of 1-0 / 0-1 //, the threads of the non-meshing ply are meshing being knitted according to a scale: 0-0 / 2-2 //.
  • the guide bar of the first ply is threaded continuously full and the guide bar of the non-sparing web is threaded continuously full.
  • At least two non-meshing plies are used.
  • two non-meshing plies are used, the guide bars of said two non-meshing plies moving symmetrically with respect to each other, offset with respect to each other in the direction of knitting. .
  • a first non-meshing web and a second non-meshing web are used, the threads of the first warp armor ply being knitted according to a 1-0 / 0-1 // scale, the yarns of the first non-woven mat being knitted according to a 1-1 / 3-3 / 2-2 / 0-0 // scale, the yarns of the second non-woven mat being knitted according to a scale of 3-3 / 2- 2 / 0-0 / 1-1 //.
  • the guide bar of the first ply according to chain weave is threaded continuously solid
  • the guide bar of the first non-weaving ply is threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty
  • the guide bar of the second non-meshing web is threaded continuously 1 full, 1 empty.
  • the two guide bars of the two non-meshing plies move in partial weft under three needles, symmetrically relative to each other, staggered with respect to each other in the direction of knitting. .
  • Such a knitting, with the weft bars moving symmetrically relative to each other and thus crossing between them, makes it possible to obtain a better maintenance of the chains and thus a better resistance to the lateral compression of the implants and / or strips obtained from the knit according to the invention.
  • the knit is subjected to a thermofixation operation.
  • the knit is thus easy to handle, in particular for the demaling step.
  • all the strips and implants obtained from the same heat-set knit have a homogeneous thermofixation which makes it possible to better guarantee the homogeneity of the physi-co-mechanical properties of one strip to the other after demagneting.
  • EE represents the direction or transverse dimension of the knit
  • FF the direction or longitudinal dimension of the knit
  • GG the direction or diagonal dimension of the knit.
  • This figure shows the movements of the warp yarns and weft yarns for a knit according to the invention having a chain ply and two non-meshing plies.
  • the A and A1 threads of the chain armor are shown in solid solid lines.
  • the wire A1 is a free-chain thread within the meaning of the present invention.
  • the A-yarns are chain yarns that are not free within the meaning of the present invention.
  • the threads of the first non-meshing ply are represented in fine solid lines: they are the B yarns.
  • the yarns of the second non-spunlace ply are represented by a dashed line: these are the C yarns.
  • the first guide bar corresponding to the chain armor is threaded continuously full.
  • the second guide bar corresponding to the first non-meshing sheet and son B, is threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty.
  • the third guide bar corresponding to the second non-meshing web and son C, is threaded continuously 1 full, 1 empty.
  • the chain yarn A1 as it appears on the figure 1 is completely traversed by any weft yarn, or in other words, any weft yarn, that is to say any yarn B or C, approaching said yarn A1, possibly binds with said yarn A1, then makes a half-turn at this chain thread A1.
  • the free warp thread A1 can thus be demilled without any consequences on the neighboring warp threads A, which are not free within the meaning of the present application, and therefore without destructuring the knit on either side of this thread A1.
  • the part of the knit on the left of this wire A1 is separated from the part situated to the right of this wire A1 without unraveling these two parts.
  • FIG 3 is the representation of a photograph, taken with a scanning electron microscope "Itashi S 800", magnification X20, of a demagnage zone of a knit according to the figure 1 and Example 1 of the present application.
  • the wire A1 is unmated and the knit portions on either side of this wire A1 are not destructured. Their edges are smooth: only a wire C performs a half-turn. No knitting yarn is cut or frayed.
  • FIG. 2 is schematically represented a knit 1 according to the invention for which the A1 free chain son are spaced regularly in the knit. Two of these wires, the wires A11 and A12 are partially unraveled. Thus, by completely unraveling these free warp threads A11 and A12, a textile medical device 2 according to the invention is obtained.
  • the heart of a textile medical device according to the invention is shown on the figure 4 , which is the representation of a photograph, taken with scanning electron microscope "Itashi S 800", X20 magnification.
  • the heart of a textile medical device according to the invention preferably corresponds to a zone of the knit according to the invention comprised between two consecutive free chain yarns.
  • the textile medical device itself does not include free warp threads. It does not present any risk of unraveling.
  • the first guide bar corresponding to the chain armor was threaded continuously full.
  • the second guide bar corresponding to the first non-meshing web, of partial weft, was threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty.
  • the third guide bar corresponding to the second non-meshing nonwoven web, was threaded continuously 1 full, 1 empty.
  • the threading of the two partial wefts was carried out so as to move under nine warp threads, this finally obtaining strips separated by about 1 cm in width each.
  • 1 in 10 warp thread, or ten percent was a free warp yarn in the sense of the invention.
  • the gauge used was 24 needles.
  • the guide bars of the two non-meshing plies moved in partial weft under three needles, symmetrically relative to each other, shifted relative to each other in the direction of manufacture of the knit.
  • This knit corresponds to the armor represented on the figure 1 of this application.
  • the strip thus obtained by demealing at least two free, preferably consecutive, chain yarns of the knit according to the invention has excellent tensile strength and is therefore entirely suitable for use as, or for the manufacture of, a supportive implant for the treatment of stress urinary incontinence and prolapse.
  • an implant 20 cm in length, or 30 cm in length or 40 cm in length can be prepared from this strip.
  • this implant has edges, including longitudinal, smooth atraumatic. Finally, all the strips or implants obtained from the same knit have a homogeneous thermofixation and are easily manipulated.

Description

La présente invention porte sur un tricot prothétique présentant des zones démaillables permettant la séparation aisée de bandes ou de bandelettes de tricot dans le sens de la fabrication du tricot. Ces bandes ou bandelettes sont utilisables comme dispositifs médicaux textiles, implantables dans le corps humain ou non.The present invention relates to a prosthetic knit having demountable areas allowing the easy separation of strips or knit strips in the direction of knitting. These strips or strips can be used as textile medical devices, implantable in the human body or not.

Par exemple, comme dispositifs textiles non implantables, on peut citer les compresses, les bandes textiles de maintien, etc.. Comme dispositifs implantables dans le corps humain, on peut citer les prothèses textiles en général, comme les renforts de parois par exemple en chirurgie pariétale, les bandelettes de soutènement urétral dans le traitement de l'incontinence d'effort chez la femme, ainsi que dans le traitement des troubles de la statique pelvienne principalement chez la femme en général, également appelés prolapsus.For example, as non-implantable textile devices, mention may be made of compresses, textile holding tapes, etc. As implantable devices in the human body, mention may be made of textile prostheses in general, such as wall reinforcements for example in surgery parietal, urethral support strips in the treatment of stress incontinence in women, as well as in the treatment of disorders of pelvic statics mainly in women in general, also called prolapse.

Ces dispositifs textiles doivent généralement présenter une tenue particulière en fonction de leur application. C'est notamment le cas des prothèses textiles implantées dans le corps humain. Ainsi, les renforts de parois pariétaux sont appelés à remplacer et/ou à renforcer et/ou à soutenir la paroi abdominale, au moins de façon temporaire. De même, les bandelettes de soutènement sous-urétral doivent soutenir l'urêtre moyen, de préférence de façon définitive et permanente. Il en va de même des implants de soutien utilisés dans le traitement des prolapsus.These textile devices must generally have a particular behavior according to their application. This is particularly the case of textile prostheses implanted in the human body. Thus, parietal wall reinforcements are required to replace and / or strengthen and / or support the abdominal wall, at least temporarily. Similarly, the suburethral support strips should support the average ureter, preferably permanently and permanently. The same is true of supportive implants used in the treatment of prolapse.

Ces prothèses textiles doivent par conséquent présenter une stabilité dimensionnelle certaine. Pour ce faire, on fait généralement subir à ces prothèses textiles une étape de thermofixation qui augmente leur stabilité dimensionnelle. Les prothèses sont alors plus facilement manipulables.These textile prostheses must therefore have a certain dimensional stability. To do this, these textile prostheses are usually subjected to a heat-setting step which increases their dimensional stability. Prostheses are then more easily manipulated.

Toutefois, la manipulation, en particulier en vue d'une opération de thermofixation, de bandelettes de petites largeurs par exemple est particulièrement mal aisée et peut conduire à de nombreux gaspillages de bandelettes devenues inutilisables, du fait d'une thermofixation mal réalisée. Par ailleurs, le fait de thermofixer chaque bandelette unitairement ne conduit pas à une thermofixation homogène et reproductible des bandelettes.However, the handling, especially for a heat-setting operation, of small strips for example strips is particularly difficult and can lead to many wasted strips become unusable due to poor heat-setting. Furthermore, the fact of heat setting each strip unitarily does not lead to a homogeneous and reproducible heat setting of the strips.

On a proposé de réaliser des tricots en grande largeur présentant les propriétés de résistance à la rupture, élasticité, porosité voulues pour ces implants, puis de découper ensuite les bandelettes ou implants dans ces tricots.It has been proposed to produce knits in wide width having the desired properties of breaking strength, elasticity and porosity for these products. implants, and then cut the strips or implants into these knits.

Toutefois, ces implants de soutien doivent pouvoir être découpés en bandelettes étroites de l'ordre de 1 cm dans des grandes longueurs, par exemple de l'ordre de 50 cm, sans se démailler ni tuiler. Par « tuilage », on entend, au sens de la présente demande, l'enroulement spontané de la bandelette sur elle-même, autour de son axe longitudinal, sous contrainte en tension selon sa longueur. Ces implants doivent conserver sous cette forme des propriétés mécaniques, notamment en résistance, suffisantes, tout en limitant au maximum le relargage de particules, c'est-à-dire de bouts de fils, lorsqu'elles sont sous contrainte. De préférence, ces implants doivent également permettre un ancrage tissulaire mécaniquement stable.However, these support implants must be able to be cut into narrow strips of the order of 1 cm in long lengths, for example of the order of 50 cm, without disbanding or tiling. By "tiling" is meant, in the sense of the present application, the spontaneous winding of the strip on itself, around its longitudinal axis, under tension stress along its length. These implants must retain in this form mechanical properties, including resistance, sufficient, while minimizing the release of particles, that is to say son ends, when they are under stress. Preferably, these implants must also allow mechanically stable tissue anchoring.

Ainsi, un problème posé par le procédé de découpage réside dans le fait que les bords des implants sont effilochés. Il se produit alors un relargage de particules notamment en cas d'élongation sous contrainte et donc de la perte de fils. Par ailleurs, les implants macroporeux élastiques découpés sont difficilement utilisables sans gaine de protection. En effet, du fait de leur élasticité et de leurs bords non lisses, ces implants s'accrochent aux tissus du patient au risque de constituer une râpe en cas de virage serré, ils se déforment, tuilent et relarguent des particules. C'est pour cela qu'ils sont généralement proposés dans une gaine protectrice, ce qui complique et alourdit l'opération chirurgicale.Thus, a problem posed by the cutting process lies in the fact that the edges of the implants are frayed. There is then a release of particles especially in the case of stress elongation and thus the loss of son. Furthermore, the cut macroporous elastic implants are difficult to use without protective sheath. Indeed, because of their elasticity and their non-smooth edges, these implants cling to the patient's tissue at the risk of forming a rasp in case of a sharp turn, they deform, tile and release particles. This is why they are generally proposed in a protective sheath, which complicates and increases the surgical operation.

Le document FR 2 453 231 décrit un procédé de réalisation de plusieurs dentelles assemblées les unes aux autres par des fils à brocher.The document FR 2,453,231 describes a method of making several laces assembled to each other by broaching son.

Le document EP 1 382 728 A1 décrit un tricot prothétique réalisé sur un métier à crochets.The document EP 1 382 728 A1 discloses a prosthetic knit made on a hook loom.

Ainsi, il existe le besoin d'un tricot, en particulier un tricot prothétique macroporeux, qui permettrait de réaliser des dispositifs médicaux textiles, en particulier des implants de soutien, par exemple sous la forme de bandelettes, faciles à produire et à manipuler et ne présentant pas de rebords effilochés et qui permettrait de fournir des bandelettes thermofixées de façon homogène.Thus, there is the need for a knitwear, in particular a macroporous prosthetic knit, which would make it possible to produce textile medical devices, in particular supportive implants, for example in the form of strips, which are easy to produce and to handle and having no frayed edges and which would provide homoformed strips homogeneously.

La présente invention vise à remédier à ce besoin en proposant un tricot présentant des zones démaillables permettant la séparation aisée, dans le sens de la fabrication du tricot, de bandes ou de bandelettes de tricot, notamment macroporeux et réalisé à partir de monofil de matériau biocompatible, en particulier par élimination d'un ou plusieurs fils de chaînette spécifiques, l'élimination dudit ou desdits fils permettant la séparation dudit tricot en bandelettes à bords lisses et sans risque d'effilochage.The present invention aims to remedy this need by proposing a knit fabric having demountable zones allowing easy separation, in the direction of manufacture of the knit fabric, of strips or strips of knit fabric, in particular macroporous, and made from monofilament of biocompatible material. , in particular by eliminating one or more specific catenary yarns, the elimination of said one or more yarns enabling the separation of said knit into strips with smooth edges and without risk of fraying.

La présente invention porte sur un tricot selon les revendications 9 ou 10. Ce tricot, de préférence prothétique et ajouré, fait d'une seule pièce, à base d'un arrangement constitué par au moins deux nappes de fils, de préférence d'un matériau polymère biocompatible, comprenant au moins une première nappe définissant une première armure chaînette et au moins une ou plusieurs nappes non maillantes, de trame partielle, chacune de ces nappes non maillantes définissant une armure, caractérisé en ce qu'il comprend au moins un fil de chaînette dit libre, un fil de chaînette libre étant défini par un fil de chaînette pour lequel, sur l'ensemble de la dimension longitudinale du tricot, tout fil desdites nappes non maillantes approchant ledit fil de chaînette libre effectue un demi-tour au niveau de ce fil de chaînette libre.The present invention relates to a knit according to claims 9 or 10. This knit, preferably prosthetic and perforated, made of a single piece, based on an arrangement consisting of at least two sheets of son, preferably a biocompatible polymeric material, comprising at least a first ply defining a first chain weave and at least one or more non-meshing plies, of partial weft, each of these non-weaving plies defining an armor, characterized in that it comprises at least one yarn of said free chain, a free warp thread being defined by a warp thread for which, over the entire longitudinal dimension of the knit, any thread of said non-meshing plies approaching said free warp thread makes a half turn at the level of of this free chain thread.

La présente invention porte encore sur l'utilisation d'un tricot tel que ci-dessus pour obtenir un dispositif médical textile, en particulier un produit prothétique à usage chirurgical, notamment pour obtenir un implant de soutien pour le traitement de l'incontinence urinaire d'effort et/ou des prolapsus.The present invention also relates to the use of a knit as above to obtain a textile medical device, in particular a prosthetic product for surgical use, in particular to obtain a support implant for the treatment of urinary incontinence. effort and / or prolapse.

Un autre objet de l'invention est un dispositif médical textile, caractérisé en ce qu'il est obtenu par démaillage d'au moins deux fils de chaînette libres, de préférence consécutifs, d'un tricot tel que ci-dessus, de préférence sur la longueur de la dimension longitudinale dudit tricot.Another object of the invention is a textile medical device, characterized in that it is obtained by demisting at least two free, preferably consecutive, chain yarns of a knit such as above, preferably on the length of the longitudinal dimension of said knit.

La présente invention porte également sur un procédé de fabrication d'un tricot selon les revendications 1 ou 2, de préférence prothétique et ajouré, fait d'une seule pièce, à base d'un arrangement constitué par au moins deux nappes de fils , de préférence d'un matériau polymère biocompatible, caractérisé en ce qu'il comprend l'étape suivante :

  • fabrication d'un tricot sur un métier chaîne ou Rachel selon une première nappe et une ou plusieurs nappes non maillantes, ladite première nappe étant enfilée en continu ou à disposition et étant obtenue à partir d'une barre à passettes, le barème suivi pour le tricotage des fils de ladite première nappe conduisant à la formation d'une chaînette, lesdites nappes non maillantes étant enfilées en continu ou à disposition, chacune desdites nappes non maillantes étant obtenue à partir d'une barre à passettes, le barème suivi pour le tricotage des fils de chaque nappe non maillante étant tel que pour au moins un fil de l'armure chaînette, dit fil de chaînette libre, pris dans le sens de fabrication du tricot, tout fil desdites nappes non maillantes approchant ledit fil de chaînette libre effectue un demi-tour au niveau de ce fil de chaînette libre.
The present invention also relates to a method of manufacturing a knit according to claims 1 or 2, preferably prosthetic and perforated, made in one piece, based on an arrangement consisting of at least two layers of yarns, preferably a biocompatible polymer material, characterized in that it comprises the following step:
  • manufacture of a knit on a warp or Rachel loom according to a first ply and one or more non-meshing plies, said first ply being threaded continuously or at disposal and being obtained from a guide bar, the scale followed for the knitting the yarns of said first ply leading to the formation of a chain, said non-meshing plies being threaded continuously or at disposal, each of said non-spunlong plies being obtained from a guide bar, the scale followed for knitting threads of each non-meshing ply being such that for at least one yarn of the chain-weave, called free-chain yarn, taken in the direction of manufacture of the knitted fabric, any yarn of said non-meshing plies approaching said free-chain yarn performs a turn around this loose chain thread.

Le tricot selon l'invention permet de produire un grand nombre de bandelettes homogènes, en particulier thermofixées de façon homogène. Le tricot selon l'invention, réalisé de préférence en grande largeur, par exemple sur une largeur allant de 1,2 à 1,5 mètres, est facilement manipulable et donc thermofixable. De plus, la thermofixation réalisée sur une pièce de grande largeur, comme exemple pour un tricot selon l'invention de 1,2 à 1,5 m de large, est particulièrement homogène, et les dispositifs médicaux textiles, en particulier les implants, obtenus à partir de ce tricot, sous formes de bandelettes séparées par démaillages des fils de chaînette libres, sont également homogènes et reproductibles.The knit according to the invention makes it possible to produce a large number of homogeneous strips, in particular thermofixed homogeneously. The knit according to the invention, preferably made in large width, for example over a width ranging from 1.2 to 1.5 meters, is easily manipulated and therefore thermofixable. In addition, the thermofixation performed on a piece of large width, as an example for a knit according to the invention of 1.2 to 1.5 m wide, is particularly homogeneous, and textile medical devices, in particular implants, obtained from this knit, in the form of strips separated by unraveling free warp threads, are also homogeneous and reproducible.

Le dispositif médical textile, en particulier l'implant de soutien, selon l'invention présente une excellente résistance à la traction, peut être peu élastique, et est ainsi tout à fait adapté à la fabrication d'un implant de soutien pour le traitement de l'incontinence urinaire d'effort et des prolapsus, sans que soit nécessaire l'utilisation d'une gaine de protection.The textile medical device, in particular the support implant, according to the invention has excellent tensile strength, may be inelastic, and is thus quite suitable for the manufacture of a support implant for the treatment of urinary stress incontinence and prolapse, without the need for a protective sheath.

Par ailleurs, du fait de son procédé de fabrication, le dispositif médical textile selon l'invention présente des bords lisses atraumatiques et stables, c'est-à-dire sans risque d'effilochage ou de relarguage de particules. Enfin, tous les dispositifs médicaux textiles, en particulier toutes les bandelettes ou implants, obtenus à partir d'un même tricot selon l'invention présentent une thermofixation homogène et sont facilement manipulables.Moreover, because of its manufacturing process, the textile medical device according to the invention has atraumatic and stable smooth edges, that is to say without risk of fraying or release of particles. Finally, all textile medical devices, in particular all strips or implants, obtained from the same knit according to the invention have a homogeneous thermofixation and are easily manipulated.

Dans la présente demande, par « tricot prothétique », on entend un tricot destiné à être implanté dans le corps humain ou animal sous la forme d'une prothèse ou de toute autre pièce façonnée au moins en partie avec ledit tricot.In the present application, "prosthetic knit" means a knit intended to be implanted in the human or animal body in the form of a prosthesis or of any other piece shaped at least in part with said knit.

Dans la présente demande, par « tricot ajouré », on entend un tricot dont l'armure ou les armures déterminent des alvéoles ou des vides dans l'épaisseur du tricot, ces alvéoles ou vides pouvant constituer des canaux débouchant de part et d'autre du tricot. Un tel tricot ajouré, encore appelé macroporeux, permet une meilleure intégration tissulaire.In the present application, "openwork knit" means a knit whose armor or armor determine cells or voids in the thickness of the knit, these cells or voids may constitute channels opening on either side knitting. Such openwork knit, also called macroporous, allows better tissue integration.

Par « nappe maillante », on entend selon la présente demande, une nappe de fils pour laquelle le barème suivi pour le tricotage des fils conduit à la formation de mailles. De façon connue, une nappe à armure chaînette est une nappe maillante, tandis que des nappes de trame partielle sont des nappes non maillantes.By "mesh tablecloth" is meant according to the present application, a sheet of son for which the scale followed for the knitting son leads to the formation of meshes. In known manner, a chain-weave web is a mesh web, while partial weft webs are non-mesh webs.

Dans la présente demande, on entend par « fil de chaînette libre », un fil de chaînette complètement traversé par aucun fil de trame, autrement dit un fil de chaînette pour lequel tout fil de trame approchant et interagissant avec ce fil de chaînette, par exemple en se liant avec lui, effectue ensuite un demi-tour au niveau de ce fil de chaînette, et ce sur l'ensemble de la dimension longitudinale du tricot.In the present application, the term "free warp thread" means a warp thread completely traversed by any weft yarn, in other words a warp yarn for which any weft yarn approaching and interacting with this warp yarn, for example by bonding with it, then performs a half-turn at this string, and this over the entire longitudinal dimension of the knit.

Dans la présente demande,

  • la masse surfacique d'un tricot est mesurée selon la norme ISO 3801,
  • la force à la rupture d'un tricot dans la direction longitudinale et dans la direction transversale est mesurée selon la norme ISO 13934-1,
  • l'allongement sous 2 daN dans la direction longitudinale est mesurée selon la norme ISO 13934-1.
In this application,
  • the density of a knit is measured according to ISO 3801,
  • the breaking force of a knit in the longitudinal direction and in the transverse direction is measured according to ISO 13934-1,
  • the elongation under 2 daN in the longitudinal direction is measured according to ISO 13934-1.

Dans une forme préférée de réalisation de l'invention, le tricot comprend au moins un pour cent de fils de chaînette libres, espacés régulièrement ou non selon la dimension transversale du tricot.In a preferred embodiment of the invention, the knit comprises at least one percent of free warp threads spaced regularly or not according to the transverse dimension of the knit.

De préférence encore, le tricot comprend au moins dix pour cent de fils de chaînette libres, espacés régulièrement selon la dimension transversale du tricot. Le tricot selon l'invention comprend une nappe non maillante présentant le barème suivant : 0-0/2-2//.More preferably, the knit comprises at least ten percent of free warp threads spaced evenly along the transverse dimension of the knit. The knit according to the invention comprises a non-meshing tablecloth having the following scale: 0-0 / 2-2 //.

Dans une forme préférée de réalisation de l'invention, le tricot selon l'invention comprend au moins deux nappes non maillantes. En effet, la présence de deux nappes non maillantes, notamment deux nappes non maillantes se croisant, c'est-à-dire dont les barres à passettes respectives se déplacent symétriquement l'une par rapport à l'autre, décalées l'une par rapport à l'autre dans le sens de la fabrication du tricot sur le métier à tricoter, permet d'obtenir des bandelettes et/ou implants présentant une très bonne résistance à la compression latérale. Ainsi, lorsqu'on compresse, par exemple entre deux doigts, les deux bords longitudinaux opposés d'un dispositif médical textile, en particulier d'une bandelette et/ou implant, obtenu à partir du tricot selon l'invention, ce dispositif médical textile, en particulier cette bandelette et/ou implant, garde significativement la même largeur. De préférence, la perte de largeur d'un dispositif médical, en particulier d'une bandelette et/ou implant, selon l'invention sous l'effet de la compression de ses deux bords longitudinaux opposés entre deux doigts est inférieure à 10%. Les dispositifs médicaux, en particulier les bandelettes et/ou implants, selon l'invention sont donc particulièrement stables à la manipulation, au passage dans des ancillaires éventuels (chas d'aiguille, canule...) et dans les tissus du patient (limitation de l'effet corde)..In a preferred embodiment of the invention, the knit according to the invention comprises at least two non-meshing plies. Indeed, the presence of two non-meshing plies, in particular two non-meshing plies crossing one another, that is to say whose respective guide bars move symmetrically with respect to one another, shifted one by relationship to the other in the direction of the manufacture of knitting on the knitting machine, allows to obtain strips and / or implants having a very good resistance to lateral compression. Thus, when compressing, for example between two fingers, the two opposite longitudinal edges of a textile medical device, in particular a strip and / or implant, obtained from the knit according to the invention, this textile medical device , in particular this strip and / or implant, keeps significantly the same width. Preferably, the width loss of a medical device, in particular a strip and / or implant, according to the invention under the effect of the compression of its two opposite longitudinal edges between two fingers is less than 10%. The medical devices, in particular the strips and / or implants, according to the invention are therefore particularly stable in handling, in passing in possible ancillaries (needle eye, cannula ...) and in the tissues of the patient (limitation of the rope effect).

Dans une forme de réalisation de l'invention, le tricot comprend une première nappe non maillante et une deuxième nappe non maillante, ladite première nappe non maillante présentant le barème 1-1/3-3/2-2/0-0//, ladite deuxième nappe non maillante présentant le barème 3-3/2-2/0-0/1-1//.In one embodiment of the invention, the knit comprises a first non-knit web and a second non-knit web, said first non-knit web having the table 1-1 / 3-3 / 2-2 / 0-0 // said second non-meshing web having the scale 3-3 / 2-2 / 0-0 / 1-1 //.

De préférence, la distance entre lesdits fils de chaînette libres, selon la dimension transversale du tricot, va de 0,5 cm à 2 cm, de préférence, de 0,5 cm à 1,5 cm.Preferably, the distance between said free warp threads, according to the transverse dimension of the knit, is from 0.5 cm to 2 cm, preferably from 0.5 cm to 1.5 cm.

De préférence, le tricot selon l'invention est un tricot prothétique. Ainsi, de préférence, le tricot est réalisé à base de fils, monofilaments ou multifilaments, d'un matériau polymère biocompatible choisi parmi le polypropylène, le polyester, le polyamide et leurs mélanges. Avantageusement, ledit matériau polymère biocompatible est le polypropylène.Preferably, the knit according to the invention is a prosthetic knit. Thus, preferably, the knit is made based son, monofilaments or multifilament, a biocompatible polymer material selected from polypropylene, polyester, polyamide and mixtures thereof. Advantageously, said biocompatible polymer material is polypropylene.

Dans une autre forme de réalisation, le tricot selon l'invention est réalisé à base de fils, monofilaments ou multifilaments, d'un matériau polymère biocompatible et biorésorbable.In another embodiment, the knit according to the invention is made from yarns, monofilaments or multifilaments, of a biocompatible and bioabsorbable polymer material.

Dans encore une autre forme de réalisation, le tricot selon l'invention est réalisé à partir d'un mélange de fils biocompatibles biorésorbables et de fils biocompatibles non biorésorbables.In yet another embodiment, the knit according to the invention is made from a mixture of bioabsorbable biocompatible yarns and nonabsorbable biocompatible yarns.

De préférence, le tricot selon l'invention est réalisé à base de fils monofilament présentant un diamètre allant de 0,05 mm à 0,15 mm, de préférence d'environ 0,10 mm.Preferably, the knit according to the invention is made from monofilament yarns having a diameter ranging from 0.05 mm to 0.15 mm, preferably from approximately 0.10 mm.

De préférence, le tricot selon l'invention présente une épaisseur allant de 0,20 mm à 0,40 mm, de préférence d'environ 0,30 mm.Preferably, the knit according to the invention has a thickness ranging from 0.20 mm to 0.40 mm, preferably around 0.30 mm.

De préférence, le tricot selon l'invention est un tricot ajouré. Ainsi, dans une forme préférée de réalisation de l'invention, le tricot selon l'invention comporte des alvéoles présentant un diamètre allant de 0,3 à 1,5 mm, de préférence allant de 0,3 à 0,9 mm. Un tel tricot permet de fabriquer un implant de soutien présentant un bon ancrage tissulaire.Preferably, the knit according to the invention is a perforated knit. Thus, in a preferred embodiment of the invention, the knit according to the invention comprises cavities having a diameter ranging from 0.3 to 1.5 mm, preferably ranging from 0.3 to 0.9 mm. Such a knit makes it possible to manufacture a support implant having good tissue anchoring.

De préférence, le tricot selon l'invention est thermofixé.Preferably, the knit according to the invention is heat set.

De préférence, le dispositif médical textile selon l'invention présente une largeur allant de 0,5 cm à 2 cm, de préférence allant de 0,5 cm à 1,5 cm.Preferably, the textile medical device according to the invention has a width ranging from 0.5 cm to 2 cm, preferably ranging from 0.5 cm to 1.5 cm.

Avantageusement, la masse surfacique du dispositif médical textile, selon l'invention va de 40 à 100 g/m2, de préférence va de 50 à 75 g/m2, et de préférence encore va de 50 à 60 g/m2.Advantageously, the weight per unit area of the textile medical device according to the invention ranges from 40 to 100 g / m 2 , preferably from 50 to 75 g / m 2 , and more preferably from 50 to 60 g / m 2 .

De préférence, le dispositif médical textile selon l'invention présente une épaisseur allant de 0,20 mm à 0,40 mm, de préférence d'environ 0,30 mm.Preferably, the textile medical device according to the invention has a thickness ranging from 0.20 mm to 0.40 mm, preferably about 0.30 mm.

De préférence, le dispositif médical textile selon l'invention comporte des alvéoles présentant un diamètre allant de 0,3 à 1,5 mm, de préférence allant de 0,3 à 0,9 mm.Preferably, the textile medical device according to the invention comprises cells having a diameter ranging from 0.3 to 1.5 mm, preferably ranging from 0.3 to 0.9 mm.

De préférence, la force à la rupture dans la direction longitudinale et transversale du dispositif médical textile selon l'invention, mesurée selon la norme ISO 13934-1, va de 20 à 90 N, de préférence de 40 à 90 N, de préférence de 55 à 75 N, de préférence encore de 60 à 70 N.Preferably, the breaking force in the longitudinal and transverse direction of the textile medical device according to the invention, measured according to the ISO 13934-1 standard, ranges from 20 to 90 N, preferably from 40 to 90 N, preferably from 55 to 75 N, more preferably 60 to 70 N.

Ainsi, le dispositif médical textile selon l'invention présente à la fois une excellente résistance mécanique, ou force à la rupture, et une masse surfacique peu élevée. Un tel dispositif médical textile est particulièrement avantageux comme implant de soutien car il permet d'obtenir un soutien efficace des organes à traiter tout en réduisant au minimum la masse de corps étranger implanté.Thus, the textile medical device according to the invention has both excellent mechanical strength, or breaking strength, and a low surface mass. Such a textile medical device is particularly advantageous as a support implant because it makes it possible to obtain effective support for the organs to be treated while minimizing the mass of implanted foreign bodies.

De préférence, l'allongement sous 2 daN dans la direction longitudinale du dispositif médical textile selon l'invention, mesuré selon la norme ISO 13934-1, est inférieur ou égal à 15%, de préférence encore inférieur ou égal à 10%. Un tel dispositif médical textile est donc particulièrement stable dimensionnellement.Preferably, the elongation under 2 daN in the longitudinal direction of the textile medical device according to the invention, measured according to ISO 13934-1, is less than or equal to 15%, more preferably less than or equal to 10%. Such a textile medical device is therefore particularly dimensionally stable.

De préférence, le dispositif médical textile selon l'invention est prothétique et ajouré et constitue un implant de soutien pour le traitement de l'incontinence urinaire d'effort et/ou des prolapsus.Preferably, the textile medical device according to the invention is prosthetic and perforated and constitutes a support implant for the treatment of stress urinary incontinence and / or prolapse.

Par ailleurs, le dispositif médical textile selon l'invention correspondant de préférence à une zone du tricot selon l'invention comprise entre deux fils de chaînette libres consécutifs, il ne comprend pas de fils de chaînette libres. Il ne présente donc aucun risque de démaillage.Moreover, the textile medical device according to the invention preferably corresponds to a zone of the knit according to the invention comprised between two consecutive loose chain yarns, it does not include free warp threads. It does not present any risk of unraveling.

De préférence, le tricot selon l'invention est fabriqué selon un procédé comprenant l'étape suivante
fabrication d'un tricot sur un métier chaîne ou Rachel selon une première nappe et une ou plusieurs nappes non maillantes, ladite première nappe étant enfilée en continu ou à disposition et étant obtenue à partir d'une barre à passettes, le barème suivi pour le tricotage des fils de ladite première nappe conduisant à la formation d'une chaînette, lesdites nappes non maillantes étant enfilées en continu ou à disposition, chacune desdites nappes non maillantes étant obtenue à partir d'une barre à passettes, le barème suivi pour le tricotage des fils de chaque nappe non maillante étant tel que pour au moins un fil de l'armure chaînette, dit fil de chaînette libre, pris dans le sens de fabrication du tricot, tout fil desdites nappes non maillantes approchant ledit fil de chaînette libre effectue un demi-tour au niveau de ce fil de chaînette libre.Preferably, the knit according to the invention is manufactured according to a process comprising the following step
manufacturing a knit on a warp or Rachel loom according to a first ply and one or more non-meshing plies, said first ply being threaded continuously or at disposal and being obtained from a guide bar, the scale followed for knitting the yarns of said first ply leading to the formation of a chain, said non-meshing plies being threaded continuously or at disposal, each of said non-meshing plies being obtained from a bar with gauges, the scale followed for the knitting of the threads of each non-meshing sheet being such that for at least one yarn of the chain armor, called free chain yarn, taken in the direction of manufacture of the knitted fabric, any yarn of said nonwovens meshing approaching said free chain thread performs a half-turn at this free chain thread.

De préférence, le barème suivi pour le tricotage des fils de chaque nappe non maillante est tel que pour au moins un pour cent, de préférence pour au moins dix pour cent, des fils de l'armure chaînette, dits fil de chaînette libres, pris dans le sens de fabrication du tricot, tout fil desdites nappes non maillantes approchant lesdits fils de chaînette libres effectue un demi-tour au niveau de ces fils de chaînette libres.Preferably, the scale followed for the knitting of the yarns of each non-meshing web is such that for at least one percent, preferably at least ten percent, of the warp armor threads, known as free warp threads, taken in the direction of manufacture of the knit, any thread of said non-meshing plies approaching said free warp threads performs a half-turn at these free warp threads.

Ainsi, selon le procédé de fabrication du tricot selon l'invention, tous les fils de chaînette, qu'ils soient libres ou non, sont tricotés avec la même barre à passette.Thus, according to the method of manufacturing the knit according to the invention, all the warp threads, whether free or not, are knitted with the same guide bar.

Dans une forme de réalisation du procédé selon l'invention, une seule nappe non maillante est utilisée, les fils de la première nappe selon armure chaînette étant tricotés selon un barème 1-0/0-1//, les fils de la nappe non maillante étant tricotés selon un barème : 0-0/2-2//.In one embodiment of the method according to the invention, a single non-meshing web is used, the threads of the first ply according to a chain-weave being knitted according to a scale of 1-0 / 0-1 //, the threads of the non-meshing ply are meshing being knitted according to a scale: 0-0 / 2-2 //.

De préférence, la barre à passette de la première nappe est enfilée en continu pleine et la barre à passettes de la nappe non maillante est enfilée en continu pleine.Preferably, the guide bar of the first ply is threaded continuously full and the guide bar of the non-sparing web is threaded continuously full.

Dans une forme préférée de réalisation du procédé selon l'invention, au moins deux nappes non maillantes sont utilisées. De préférence, deux nappes non maillantes sont utilisées, les barres à passettes desdites deux nappes non maillantes se déplaçant symétriquement l'une par rapport à l'autre, décalées l'une par rapport à l'autre dans le sens de la fabrication du tricot. Dans une autre forme de réalisation du procédé selon l'invention une première nappe non maillante et une deuxième nappe non maillantes sont utilisées, les fils de la première nappe selon armure chaînette étant tricotés selon un barème 1-0/0-1//, les fils de la première nappe non maillante étant tricotés selon un barème 1-1/3-3/2-2/0-0//, les fils de la deuxième nappe non maillante étant tricotés selon un barème 3-3/2-2/0-0/1-1//.In a preferred embodiment of the method according to the invention, at least two non-meshing plies are used. Preferably, two non-meshing plies are used, the guide bars of said two non-meshing plies moving symmetrically with respect to each other, offset with respect to each other in the direction of knitting. . In another embodiment of the method according to the invention a first non-meshing web and a second non-meshing web are used, the threads of the first warp armor ply being knitted according to a 1-0 / 0-1 // scale, the yarns of the first non-woven mat being knitted according to a 1-1 / 3-3 / 2-2 / 0-0 // scale, the yarns of the second non-woven mat being knitted according to a scale of 3-3 / 2- 2 / 0-0 / 1-1 //.

De préférence, la barre à passette de la première nappe selon armure chaînette est enfilée en continu pleine, la barre à passettes de la première nappe non maillante est enfilée en continu 1 plein, 1 vide, 3 pleins, 1 vide, 1 plein, 3 vides, et la barre à passettes de la deuxième nappe non maillante est enfilée en continu 1 plein, 1 vide.Preferably, the guide bar of the first ply according to chain weave is threaded continuously solid, the guide bar of the first non-weaving ply is threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty, and the guide bar of the second non-meshing web is threaded continuously 1 full, 1 empty.

Avantageusement, les deux barres à passettes des deux nappes non maillantes se déplacent en trame partielle sous trois aiguilles, symétriquement l'une par rapport à l'autre, décalées l'une par rapport à l'autre dans le sens de la fabrication du tricot. Un tel tricotage, avec les barres de trame se déplaçant symétriquement l'une par rapport à l'autre et donc croisant entre elles, permet d'obtenir un meilleur maintien des chaînettes et donc une meilleure résistance à la compression latérale des implants et/ou bandelettes obtenus à partir du tricot selon l'invention.Advantageously, the two guide bars of the two non-meshing plies move in partial weft under three needles, symmetrically relative to each other, staggered with respect to each other in the direction of knitting. . Such a knitting, with the weft bars moving symmetrically relative to each other and thus crossing between them, makes it possible to obtain a better maintenance of the chains and thus a better resistance to the lateral compression of the implants and / or strips obtained from the knit according to the invention.

De préférence, en sortie de métier, le tricot est soumis à une opération de thermofixation. Le tricot est ainsi aisément manipulable, en particulier pour l'étape de démaillage. Par ailleurs, toutes les bandelettes et implants obtenus à partir d'un même tricot thermofixé présentent une thermofixation homogène ce qui permet de mieux garantir l'homogénéité des propriétés physi-co-mécaniques d'une bandelette à l'autre après démaillage.Preferably, at the end of the trade, the knit is subjected to a thermofixation operation. The knit is thus easy to handle, in particular for the demaling step. Moreover, all the strips and implants obtained from the same heat-set knit have a homogeneous thermofixation which makes it possible to better guarantee the homogeneity of the physi-co-mechanical properties of one strip to the other after demagneting.

L'invention sera mieux comprise de la description qui suit en référence aux dessins annexés.

  • la figure 1 représente un dessin schématique simplifié d'un tricot comprenant une première nappe d'armure chaînette et deux nappes non maillantes,
  • la figure 2 représente un tricot prothétique selon l'invention dont deux fils de chaînette libres sont partiellement démaillés,
  • la figure 3 est la représentation d'une vue au microscope électronique à balayage « Itashi S 800 », grossissement X20, du démaillage d'un fil de chaînette libre dans un tricot selon l'invention,
  • la figure 4 est la représentation d'une vue au microscope électronique à balayage « Itashi S 800 », grossissement X20, du coeur d'un implant selon l'invention.
The invention will be better understood from the description which follows with reference to the accompanying drawings.
  • the figure 1 represents a simplified schematic drawing of a knit comprising a first warp armor ply and two non-spun webs,
  • the figure 2 represents a prosthetic knit according to the invention of which two free warp threads are partially unraveled,
  • the figure 3 is the representation of a scanning electron microscope "Itashi S 800", magnification X20, of the unraveling of a free chain yarn in a knit according to the invention,
  • the figure 4 is the representation of a scanning electron microscope "Itashi S 800", magnification X20, of the heart of an implant according to the invention.

Sur la figure 1, pour un tricot selon l'invention, on a représenté par E-E' la direction ou dimension transversale du tricot, par F-F' la direction ou dimension longitudinale du tricot et par G-G' la direction ou dimension diagonale du tricot.On the figure 1 for a knit according to the invention, EE 'represents the direction or transverse dimension of the knit, FF' the direction or longitudinal dimension of the knit and GG 'the direction or diagonal dimension of the knit.

Sur cette figure, sont représentés les déplacements des fils de chaînette et des fils de trame pour un tricot selon l'invention présentant une nappe chaînette et deux nappes non maillantes. Les fils A et A1 de l'armure chaînette sont représentés en traits pleins épais. Le fil A1 est un fil de chaînette libre au sens de la présente invention. Les fils A sont des fils de chaînette qui ne sont pas libres au sens de la présente invention. Les fils de la première nappe non maillante sont représentés en traits pleins fins : ce sont les fils B. Les fils de la deuxième nappe non maillante sont représentés par un trait en pointillés: ce sont les fils C.This figure shows the movements of the warp yarns and weft yarns for a knit according to the invention having a chain ply and two non-meshing plies. The A and A1 threads of the chain armor are shown in solid solid lines. The wire A1 is a free-chain thread within the meaning of the present invention. The A-yarns are chain yarns that are not free within the meaning of the present invention. The threads of the first non-meshing ply are represented in fine solid lines: they are the B yarns. The yarns of the second non-spunlace ply are represented by a dashed line: these are the C yarns.

Sur cet exemple, la première barre à passettes, correspondant à la l'armure chaînette est enfilée en continu pleine. La deuxième barre à passettes, correspondant à la première nappe non maillante et aux fils B, est enfilée en continu 1 plein, 1 vide, 3 pleins, 1 vide, 1 plein, 3 vides. La troisième barre à passettes, correspondant à la deuxième nappe non maillante et aux fils C, est enfilée en continu 1 plein, 1 vide.In this example, the first guide bar, corresponding to the chain armor is threaded continuously full. The second guide bar, corresponding to the first non-meshing sheet and son B, is threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty. The third guide bar, corresponding to the second non-meshing web and son C, is threaded continuously 1 full, 1 empty.

Les barèmes de tricotage pour ces trois nappes sont les suivants :

  • la nappe chaînette (fils A et A1) : 1-0/0-1//,
  • la première nappe non maillante (fils B) : 1-1/3-3/2-2/0-0//.
  • la deuxième nappe non maillante (fils C) : 3-3/2-2/0-0/1-1//.
The knitting scales for these three tablecloths are as follows:
  • the chain ply (wires A and A1): 1-0 / 0-1 //,
  • the first non-meshing web (yarn B): 1-1 / 3-3 / 2-2 / 0-0 //.
  • the second non-meshing web (yarn C): 3-3 / 2-2 / 0-0 / 1-1 //.

Ainsi, le fil de chaînette A1, comme il apparaît sur la figure 1 n'est complètement traversé par aucun fil de trame, ou autrement dit, tout fil de trame, c'est-à-dire tout fil B ou C, approchant ledit fil de chaînette A1, se lie éventuellement avec cedit fil de chaînette A1, puis effectue un demi-tour au niveau de ce fil de chaînette A1.Thus, the chain yarn A1, as it appears on the figure 1 is completely traversed by any weft yarn, or in other words, any weft yarn, that is to say any yarn B or C, approaching said yarn A1, possibly binds with said yarn A1, then makes a half-turn at this chain thread A1.

Le fil de chaînette libre A1 peut ainsi être démaillé sans conséquences sur les fils de chaînette A voisins, qui eux ne sont pas libres au sens de la présente demande, et donc sans déstructurer le tricot de part et d'autre de ce fil A1. En tirant sur le fil de chaînette A1, on sépare la partie du tricot située à la gauche de ce fil A1 de la partie située à la droite de ce fil A1 sans démailler ces deux parties.The free warp thread A1 can thus be demilled without any consequences on the neighboring warp threads A, which are not free within the meaning of the present application, and therefore without destructuring the knit on either side of this thread A1. By pulling on the warp thread A1, the part of the knit on the left of this wire A1 is separated from the part situated to the right of this wire A1 without unraveling these two parts.

Par ailleurs, du fait que tout fil de trame approchant le fil A1 effectue un demi-tour au niveau de ce fil A1, les bords des parties séparées ne présentent qu'un fil B ou C effectuant un demi-tour et sont de ce fait lisses. Aucun effilochage ne se produit.On the other hand, because any weft yarn approaching the yarn A1 makes a half-turn at this yarn A1, the edges of the separated parts have only one yarn B or C making a half-turn and are therefore smooth. No fraying occurs.

Un tel démaillage d'un fil de chaînette libre A1 d'un tricot selon l'invention est visible sur la figure 3, qui est la représentation d'une photographie, prise au microscope électronique à balayage « Itashi S 800 », grossissement X20, d'une zone de démaillage d'un tricot selon la figure 1 et l'exemple 1 de la présente demande. Dans la partie haute de la figure, le fil A1 est démaillé et les parties de tricot de part et d'autre de ce fil A1 ne sont pas déstructurées. Leurs bords sont lisses : seul un fil C effectue un demi-tour. Aucun fil du tricot n'est coupé ou ne s'effiloche. Comme il apparaît nettement sur cette figure 3, grâce à l'enfilage particulier des fils des nappes non maillantes, le fil C effectuant un demi-tour au niveau du bord d'une partie séparée fait corps avec le coeur de cette partie séparée. Sur cette figure, le fil A1 est en cours de démaillage. Ainsi, au bas de la figure, le fil A1 est encore maillé avec les fils C s'approchant de lui.Such unraveling of a free warp thread A1 of a knit according to the invention is visible on the figure 3 , which is the representation of a photograph, taken with a scanning electron microscope "Itashi S 800", magnification X20, of a demagnage zone of a knit according to the figure 1 and Example 1 of the present application. In the upper part of the figure, the wire A1 is unmated and the knit portions on either side of this wire A1 are not destructured. Their edges are smooth: only a wire C performs a half-turn. No knitting yarn is cut or frayed. As it clearly appears on this figure 3 thanks to the particular threading of the threads of the non-meshing plies, the thread C performing a half-turn at the edge of a separate part forms a body with the heart of this separated part. In this figure, the A1 wire is being unmaked. Thus, at the bottom of the figure, the wire A1 is still meshed with the C wires approaching him.

A la fin du démaillage, c'est-à-dire lorsque le fil A1 a été démaillé sur la totalité de la longueur du tricot, le fil A1 est éliminé du tricot selon l'invention et les deux parties du tricot situées de part et d'autre de ce fil A1 sont complètement séparées. En démaillant de la même façon un deuxième fil de chaînette libre, on sépare complètement une bandelette du tricot. La répartition des fils A1 permet de prédéterminer avec une grande précision la largeur de chaque bandelette.At the end of the unraveling, that is to say when the wire A1 has been peeled over the entire length of the knit, the yarn A1 is removed from the knit according to the invention and the two parts of the knitted fabric from else of this wire A1 are completely separated. By unraveling in the same way a second free warp thread, a strip of the knit is completely separated. The distribution of A1 son allows to predetermine with great precision the width of each strip.

Sur la figure 2 est représenté schématiquement un tricot 1 selon l'invention pour lesquels les fils A1 de chaînette libres sont espacés régulièrement dans le tricot. Deux de ces fils, les fils A11 et A12 sont partiellement démaillés. Ainsi, en démaillant complètement ces fils de chaînette libres A11 et A12, on obtient un dispositif médical textile 2 selon l'invention.On the figure 2 is schematically represented a knit 1 according to the invention for which the A1 free chain son are spaced regularly in the knit. Two of these wires, the wires A11 and A12 are partially unraveled. Thus, by completely unraveling these free warp threads A11 and A12, a textile medical device 2 according to the invention is obtained.

Le coeur d'un dispositif médical textile selon l'invention est montré sur la figure 4, qui est la représentation d'une photographie, prise au microscope électronique à balayage « Itashi S 800 », grossissement X20. Le coeur d'un dispositif médical textile selon l'invention, correspond de préférence à une zone du tricot selon l'invention comprise entre deux fils de chaînette libres consécutifs. Ainsi, le dispositif médical textile lui-même ne comprend pas de fils de chaînette libres. Il ne présente donc aucun risque de démaillage.The heart of a textile medical device according to the invention is shown on the figure 4 , which is the representation of a photograph, taken with scanning electron microscope "Itashi S 800", X20 magnification. The heart of a textile medical device according to the invention preferably corresponds to a zone of the knit according to the invention comprised between two consecutive free chain yarns. Thus, the textile medical device itself does not include free warp threads. It does not present any risk of unraveling.

EXEMPLE :EXAMPLE:

On a réalisé un tricot selon l'invention à partir d'un fil monofilament de polypropylène, de diamètre 0,10 mm, sur un métier Rachel, avec une nappe chaînette et deux nappes non maillantes, selon les barèmes suivants pour les différentes nappes :

  • la nappe chaînette : 1-0/0-1//,
  • la première nappe non maillante : 1-1/3-3/2-2/0-0//,
  • la deuxième nappe non maillante : 3-3/2-2/0-0/1-1//.
A knit according to the invention was made from a polypropylene monofilament yarn, with a diameter of 0.10 mm, on a Rachel loom, with a tablecloth chain and two non-meshing tablecloths, according to the following scales for the different tablecloths:
  • the chain-mail tablecloth: 1-0 / 0-1 //,
  • the first non-meshing web: 1-1 / 3-3 / 2-2 / 0-0 //,
  • the second non-meshing layer: 3-3 / 2-2 / 0-0 / 1-1 //.

La première barre à passettes, correspondant à la l'armure chaînette était enfilée en continu pleine. La deuxième barre à passettes, correspondant à la première nappe non maillante, de trame partielle, était enfilée en continu 1 plein, 1 vide, 3 pleins, 1 vide, 1 plein, 3 vides. La troisième barre à passettes, correspondant à la deuxième nappe non maillante, de trame partielle, était enfilée en continu 1 plein, 1 vide. L'enfilage des deux trames partielles a été effectué de façon à se déplacer sous neufs fils de chaînette, ceci permettant d'obtenir au final des bandelettes séparées d'environ 1 cm de largeur chacune. Ainsi, dans cet exemple, 1 fil de chaînette sur 10, soit dix pour cent, était un fil de chaînette libre au sens de l'invention.The first guide bar, corresponding to the chain armor was threaded continuously full. The second guide bar, corresponding to the first non-meshing web, of partial weft, was threaded continuously 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty. The third guide bar, corresponding to the second non-meshing nonwoven web, was threaded continuously 1 full, 1 empty. The threading of the two partial wefts was carried out so as to move under nine warp threads, this finally obtaining strips separated by about 1 cm in width each. Thus, in this example, 1 in 10 warp thread, or ten percent, was a free warp yarn in the sense of the invention.

La jauge utilisée était de 24 aiguilles.The gauge used was 24 needles.

Les barres à passettes des deux nappes non maillantes se déplaçaient en trame partielle sous trois aiguilles, symétriquement l'une par rapport à l'autre, décalées l'une par rapport à l'autre dans le sens de la fabrication du tricot.The guide bars of the two non-meshing plies moved in partial weft under three needles, symmetrically relative to each other, shifted relative to each other in the direction of manufacture of the knit.

Ce tricot correspond à l'armure représentée sur la figure 1 de la présente demande.This knit corresponds to the armor represented on the figure 1 of this application.

En sortie de métier, le tricot a été soumis à une opération de thermofixation.On leaving the trade, the knit was subjected to a heat-setting operation.

Le tricot présentait les caractéristiques suivantes :

  • épaisseur : environ 0,3 mm
  • diamètre des alvéoles : environ 1 mm.
The knitting had the following characteristics:
  • thickness: about 0.3 mm
  • diameter of the cells: about 1 mm.

A partir de ce tricot, on a obtenu des bandelettes en démaillant au moins deux fils de chaînette libres consécutifs. Les bandelettes présentaient les caractéristiques suivantes :

  • épaisseur : environ 0,3 mm
  • diamètre des alvéoles : environ 1 mm.
  • largeur : environ 1 cm.
  • masse surfacique : environ 50 g/m2.
  • force à la rupture mesurée selon la méthode ISO 13934-1 sur une bandelette de 1 cm de large et de 20 cm de longueur : 66 N.
From this knit, strips were obtained by unraveling at least two consecutive free chain yarns. The strips had the following characteristics:
  • thickness: about 0.3 mm
  • diameter of the cells: about 1 mm.
  • width: about 1 cm.
  • mass per unit area: about 50 g / m 2 .
  • breaking force measured according to ISO 13934-1 method on a strip 1 cm wide and 20 cm long: 66 N.

La bandelette ainsi obtenue par démaillage d'au moins deux fils de chaînette libres, de préférence consécutifs, du tricot selon l'invention présente une excellente résistance à la traction et est ainsi tout à fait adaptée à une utilisation comme, ou à la fabrication d'un, implant de soutien pour le traitement de l'incontinence urinaire d'effort et des prolapsus.The strip thus obtained by demealing at least two free, preferably consecutive, chain yarns of the knit according to the invention has excellent tensile strength and is therefore entirely suitable for use as, or for the manufacture of, a supportive implant for the treatment of stress urinary incontinence and prolapse.

Par exemple, un implant de 20 cm de longueur, ou de 30 cm de longueur ou encore de 40 cm de longueur peut être préparé à partir de cette bandelette.For example, an implant 20 cm in length, or 30 cm in length or 40 cm in length can be prepared from this strip.

Par ailleurs, du fait de son procédé de fabrication, cet implant présente des bords, notamment longitudinaux, lisses atraumatiques. Enfin, toutes les bandelettes ou implants obtenus à partir d'un même tricot présentent une thermofixation homogène et sont facilement manipulables.Furthermore, because of its manufacturing process, this implant has edges, including longitudinal, smooth atraumatic. Finally, all the strips or implants obtained from the same knit have a homogeneous thermofixation and are easily manipulated.

Claims (33)

  1. A method of manufacturing a knit fabric (1) made in one-piece part, based on an arrangement constituted by at least two sheets of yarns, comprising the following step:
    manufacturing a knit fabric on a warp knitting loom or Rachel loom according to a first sheet and a non-meshing sheet, said first sheet being threaded continuously or in a determined setup and being obtained from a guide bar, the chart followed for knitting the yarns of said first sheet leading to the formation of a warp, said non-meshing sheet being threaded continuously or in a determined setup, said non-meshing sheet being obtained from a guide bar, the chart followed for knitting the yarns of the non-meshing sheet being such that for at least one yarn (A1, A11, A12) of the warp weave, referred to as free warp yarn, taken in the direction of manufacture of the knit fabric, any yarn of said non-meshing sheet getting close to said free warp yarn performs a half-turn at this free warp yarn,
    characterized in that one non-meshing sheet only is used, the yarns of the first sheet according to the warp weave being knitted according to a chart 1-0/0-1//, the yarns of the non-meshing sheet being knitted according to a chart: 0-0/2-2//.
  2. A method of manufacturing a knit fabric (1) made in one-piece part, based on an arrangement consisting of at least two sheets of yarns, comprising the following step :
    manufacturing a knit fabric on a warp knitting loom or Rachel loom according to a first sheet and several non-meshing sheets, said first sheet being threaded continuously or in a determined setup and being obtained from a guide bar, the chart followed for knitting the yarns of said first sheet leading to the formation of a warp, said non-meshing sheets being threaded continuously or in a determined setup, each of said non-meshing sheet being obtained from a guide bar, the chart followed for knitting the yarns of each non-meshing sheet being such that for at least one yarn (A1, A11, A12) of the warp weave, referred to as free warp yarn, taken in the direction of manufacture of the knit fabric, any yarn of said non-meshing sheet getting close to said free warp yarn performs a half-turn at this free warp yarn,
    characterized in that a first non-meshing sheet and a second non-meshing sheet are used, the yarns of the first sheet according to the warp weave being knitted according to a chart 1-0/0-1//, the yarns of the first non-meshing sheet being knitted according to a chart 1-1/3-3/2-2/0-0//, the yarns of the second non-meshing sheet being knitted according to a chart 3-3/2-2/0-0/1-1//.
  3. The method according to claim 1 or 2, characterized in that the chart followed for knitting the yarns of each non-meshing sheet is such that for at least one percent of the yarns of the warp weave, said free warp yarns (A1, A11, A12), taken in the direction of manufacture of the knit fabric, any yarn of said non-meshing sheets getting close to said free warp yarns performs a half-turn at these free warp yarns (A1, A11, A12).
  4. The method according to claim 1, characterized in that the guide bar of the first sheet is continuously threaded full and the guide bar of the non-meshing sheet is continuously threaded full.
  5. The method according to claim 2, characterized in that the guide bars of said two non-meshing sheets move symmetrically with respect to each other, shifted with respect to each other in the direction of manufacture of the knit fabric.
  6. The method according to any of claims 2, 3 or 5, characterized in that the guide bar of the first sheet according to the warp weave is continuously threaded full, the guide bar of the first non-meshing sheet is continuously threaded 1 full, 1 empty, 3 full, 1 empty, 1 full, 3 empty, and the guide bar of the second non-meshing sheet is continuously threaded 1 full, 1 empty.
  7. The method according to claim 6, characterized in that the two guide bars of the two non-meshing sheets move in partial weft under three needles, symmetrically with respect to each other, shifted with respect to each other in the direction of manufacture of the knit fabric.
  8. The method according to any one of claims 1 to 7, characterized in that, at the output of the warp knitting loom, the knit fabric is subjected to a thermosetting operation.
  9. A knit fabric (1) made in one-piece part, based on an arrangement consisting of two sheets of yarns, comprising at least one first sheet defining a first warp weave and at least one or more non-meshing sheets, of partial weft, each of these non-meshing sheets defining a warp weave, comprising at least one warp yarn referred to as free warp yarn (A1, A11, A12), a free warp yarn being defined by a warp yarn for which, over the entire longitudinal dimension of the knit fabric, any yarn of said non-meshing sheets getting close to said warp yarn performs a half-turn at the free warp yarn,
    characterized in that it comprises a non-meshing sheet having the following chart :0-0/2-2//.
  10. A knit fabric (1) made of one-piece part, based on an arrangement consisting of at least two sheets of yarns, comprising at least one first sheet defining a first warp weave and at least one or more non-meshing sheets, of partial weft, each of these non-meshing sheets defining a warp weave, comprising at least one warp yarn referred to as free warp yarn (A1, A11, A12), a free warp yarn being defined by a warp yarn for which, over the entire longitudinal dimension of the knit fabric, any warp yarn of said non-meshing sheets getting close to said free warp yarn performs a half-turn at this free warp yarn,
    characterized in that it comprises a first non-meshing sheet and a second non-meshing sheet, said first non-meshing sheet having the chart 1-1/3-3/2-2/0-0//, said second non-meshing sheet having the chart 3-3/2-2/0-0/1-1//.
  11. The knit fabric (1) according to claim 9 or 10, characterized in that it comprises at least one percent of free warp yarns, spaced, regularly or not, along the transverse dimension of the knit fabric.
  12. The knit fabric (1) according to claim 9 to 11, characterized in that it comprises at least ten percent of free warp yarns, regularly spaced along the transverse dimension of the knit fabric.
  13. The knit fabric (1) according to any one of claims 9 to 12, characterized in that the distance between said free warp yarns, along the transverse dimension of the knit fabric ranges from 0.5 to 2 cm.
  14. The knit fabric (1) according to any one of claims 9 to 13, characterized in that it is prosthetic.
  15. The knit fabric (1) according to claim 14, characterized in that it is based on yarns made of biocompatible polymer material.
  16. The knit fabric (1) according to the preceding claim, characterized in that it is based on yarns, monofilaments or multifilaments, made of biocompatible polymer material selected from polypropylene, polyester, polyamide and mixtures thereof.
  17. The knit fabric (1) according to claim 16, characterized in that said biocompatible polymer material is polypropylene.
  18. The knit fabric (1) according to claim 15, characterized in that it is based on yarns, monofilaments or multifilaments, made of biocompatible and bioresorbable polymer material.
  19. The knit fabric (1) according to claim 15, characterized in that it is made from a mixture of biocompatible and bioresorbable yarns and biocompatible and non-bioresorbable yarns.
  20. The knit fabric (1) according to any one of claims 9 to 19, characterized in that it is based on monofilament yarns having a diameter ranging from 0.05 mm to 0.15 mm.
  21. The knit fabric (1) according to any one of claims 9 to 20, characterized in that it has a thickness ranging from 0.20 mm to 0.40 mm.
  22. The knit fabric (1) according to any one of claims 9 to 21, characterized in that it is openworked.
  23. The knit fabric (1) according to the preceding claim, characterized in that it includes cells having a diameter ranging from 0.3 to 1.5 mm.
  24. The knit fabric (1) according to any one of claims 9 to 23, characterized in that it is thermo-set.
  25. A use of a knit fabric (1) according to any one of claims 9 to 24 for obtaining a support implant for the treatment of stress urinary and/or prolapse incontinence.
  26. A fabric medical device (2), characterized in that it is obtained by unravelling at least two free warp yarns of a knit fabric (1), according to any one of claims 9 to 24.
  27. The fabric medical device (2) according to claim 26, characterized in that it has a width ranging from 0.5 cm to 2 cm.
  28. The fabric medical device (2) according to claims 26 or 27, characterized in that its basis weight ranges from 40 to 100 g/m2.
  29. The fabric medical device (2) according to any one of claims 26 to 28, characterized in that it has a thickness ranging from 0.20 mm to 0.40 mm.
  30. The fabric medical device (2) according to any one of claims 26 to 29, characterized in that it includes cells having a diameter ranging from 0.3 to 1.5 mm.
  31. The fabric medical device (2) according to any one of claims 26 to 30, characterized in that its force of rupture along the longitudinal and transverse direction, measured according to the ISO 13934-1 standard, ranges from 20 to 90 N.
  32. The fabric medical device (2) according to any one of claims 26 to 31, characterized in that it has an elongation under 2 daN along the longitudinal direction, measured according to the ISO 13934-1 standard, less than or equal to 15%.
  33. The fabric medical device (2) according to any one of claims 26 to 32, characterized in that it is prosthetic and openworked and constitutes a support implant for treating stress urinary and/or prolapse incontinence.
EP06755444.4A 2005-04-22 2006-04-21 Unravelable knit fabric Not-in-force EP1896637B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0504066A FR2884835B1 (en) 2005-04-22 2005-04-22 DEMAILABLE KNIT
PCT/FR2006/000891 WO2006111665A2 (en) 2005-04-22 2006-04-21 Unravelable knit fabric

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EP1896637A2 EP1896637A2 (en) 2008-03-12
EP1896637B1 true EP1896637B1 (en) 2017-12-20

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FR2912761B1 (en) * 2007-02-15 2009-05-08 Sofradim Production Sa PROTHETIC KNIT FOR THE TREATMENT OF PROLAPSUS
US9326840B2 (en) * 2008-12-15 2016-05-03 Allergan, Inc. Prosthetic device and method of manufacturing the same
FR2975585B1 (en) 2011-05-23 2013-05-31 Mdb Texinov Sa TEXTILE IMPLANT AND METHOD FOR PRODUCING THE SAME

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JPS6116390U (en) * 1984-07-05 1986-01-30 マツモト・テキスタイル株式会社 Stretchable warp knitted fabric for narrow width
CA1334640C (en) * 1988-09-09 1995-03-07 Smith And Nephew Plc Conformable bandage
US5353486A (en) * 1992-11-13 1994-10-11 Minnesota Mining And Manufacturing Company Narrow fiberglass knit tape
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FR2779937B1 (en) * 1998-06-23 2000-08-11 Sofradim Production ADJUSTED ISOELASTIC PROSTHETIC FABRIC
FR2807937B1 (en) * 2000-04-20 2002-08-02 Sofradim Production GRIPPED PROSTHETIC KNIT, MANUFACTURING METHOD THEREOF AND REINFORCEMENT IMPLANT FOR THE TREATMENT OF WALL DEFICITS
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JP3954986B2 (en) * 2003-05-13 2007-08-08 吉田産業株式会社 Manufacturing method of warp knitted fabric and warp knitted fabric

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FR2884835B1 (en) 2008-03-14
JP2008537027A (en) 2008-09-11
WO2006111665A3 (en) 2006-12-28
FR2884835A1 (en) 2006-10-27
EP1896637A2 (en) 2008-03-12
WO2006111665A2 (en) 2006-10-26

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