Knit with zones without barbs, method of making same and prostheses obtained therefrom
AssigneeSofradim Production
InventorsJulie Lecuivre, Pierre Bailly
Life of this patent
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Abstract
The present invention relates to an openwork prosthetic knit (1) made from a single piece based on first yarns of biocompatible polymer materials that define a first face (2) and a second face that are opposite one another and on a second biocompatible yarn that generates barbs (3) that protrude outwards from at least said first face, characterized in that said first face comprises at least one zone in which it is provided with said barbs and at least one zone (5) in which it is free of such barbs. It also relates to a process for manufacturing such a knit (1) and to a prosthesis comprising such a knit (1).
Claims18
An openwork prosthetic knit comprising a single piece based on at least a first yarn made of biocompatible polymer material that defines a first face and a second face that are opposite one another and on a second biocompatible yarn that generates barbs that protrude outwards from at least said first face, wherein said first face comprises at least a first zone provided with said barbs and at least a second zone free of said barbs.
A process for manufacturing a knit, comprising the following steps:
- a) manufacturing an arrangement of at least one first yarn of biocompatible polymer material that defines a first face and a second face that are opposite one another for said knit and of at least one second yarn comprising a biocompatible heat-fusible monofilament yarn, that forms small loops that protrude outwards from said first face, by knitting on a warp or Raschel knitting machine of said first yarn(s) and second yarns using at least three guide bars, said first yarn(s) being threaded, continuously on two of said three guide bars, and said second yarn being threaded continuously on the third guide bar,
- b) cutting, by melting, of said loops, each loop generating two barbs,
- c) melting and flattening said barbs over one or more given zone(s) of the first face by application, with pressure, to said zone(s) of an anvil (4) heated to the a melting point of said barbs.
(canceled)
Dependencies are inferred from the claim text.