Barbed prosthetic knit and hernia repair mesh made therefrom as well as process for making said prosthetic knit

• US 9,445,883 B2
• Filed: 12/27/2012
• Issued: 09/20/2016
• Est. Priority Date: 12/29/2011
• Status: Active Grant

• Current Assignee: Sofradim Production
• Original Assignee: Sofradim Production
• Inventors: Lecuivre, Julie, Bourges, Xavier, Bailly, Pierre
• Primary Examiner(s): Woo, Julian W
• Application Number:
  US14/366,393
• Publication Number:
  US 20140350578A1
• Time in Patent Office: 1,363 Days
• US Class Current: 1/1
• CPC Class Codes: A61F 2/0063 Implantable repair or support meshes, e.g. hernia meshes
• CPC Class Codes: A61F 2002/0068 having a special mesh pattern
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: D04B 21/12 characterised by thread material
• CPC Class Codes: D04B 21/14 Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes pile fabrics D04B21/02; non-woven fabrics in general D04H
• CPC Class Codes: D04B 21/20 specially adapted for knitting articles of particular configuration
• CPC Class Codes: D06C 7/00 Heating or cooling textile fabrics
• CPC Class Codes: D10B 2401/041 thermoplastic; thermosetting
• CPC Class Codes: D10B 2403/0111 One hairy surface, e.g. napped or raised for pile fabrics D03D27/00, D04B1/02, D04B21/02
• CPC Class Codes: D10B 2501/0632 of the touch-and-close type
• CPC Class Codes: D10B 2509/08 Hernia repair mesh

Abstract

The present invention relates to a prosthetic knit based on at least a first yarn of biocompatible polymer material defining first and second opposite and openwork faces, and on at least a second biocompatible and heat-fusible monofilament yarn, forming barbs that protrude outwards from at least said first face and are obtained by melting loops generated by said second yarn, the chart followed for the knitting of said first and second yarns on a warp knitting machine having three guide bars B1, B2, B3 being the following, according to the ISO 11676 standard:—Bar B1: 1.0/0.1//—Bar B2: 1.0/7.7/6.6/7.7//—Bar B3: 2.1/5.5/3.4/0.0// said second yarn following the chart of bar B3. The present invention also relates to a process for manufacturing such a knit.

Claims

1. A prosthetic knit comprising at least a first yarn of biocompatible polymer material defining first and second opposite and openwork faces, and at least a second biocompatible and heat-fusible monofilament yarn which forms barbs that protrude outwards from at least said first face and are obtained by melting loops generated by said second yarn, said first and second yarns being knit on a warp knitting machine having three guide bars B1, B2, B3, according to ISO 11676 standard and the following chart:

Bar B1;

1.0/0.1//

Bar B2;

1.0/7.7/6.6/7.7//

Bar B3;

2.1/5.5/3.4/0.0//

said second yarn following the chart of bar B3.

2. The knit according to claim 1, wherein the first yarns are monofilament yarns.

3. The knit according to claim 2, wherein the first yarns are monofilament yarns made of polyester terephthalate (PET) having a diameter of 0.09 mm.

4. The knit according to claim 3, wherein the second heat-fusible monofilament yarn comprises a material selected from polypropylene, polyglycolic acid, polylactic acid, and mixtures thereof.

5. The knit according to claim 3, wherein the second heat-fusible monofilament yarn is a polylactic acid monofilament yarn having a diameter of 0.15 mm.

6. A process for manufacturing a prosthetic knit, comprising the following steps:

i) knitting, on a warp knitting machine, of biocompatible yarns distributed over three guide bars, B1, B2 and B3, according to the following chart, according to the ISO 11676 standard;

Bar B1;

1.0/0.1//

Bar B2;

1.0/7.7/6.6/7.7//

Bar B3;

2.1/5.5/3.4/0.0//

the yarn threaded on bar B3 being a heat-fusible monofilament yarn that generates loops that protrude outwards with respect to a first face of said prosthetic knit,

ii) cutting, by melting, of each loop, each loop thus generating two barbs.

7. The process according to claim 6, wherein the yarns threaded on bar B1 and bar B2 are monofilament yarns.

8. The process according to claim 6, wherein the yarns threaded on bar B1 and bar B2 are monofilament yarns made of polyester terephthalate (PET) having a diameter of 0.09 mm.

9. The process according to claim 6, wherein the yarn threaded on Bar B3 is selected from the heat-fusible monofilament yarns made of a material selected from polypropylene, polyglycolic acid, polylactic acid, and mixtures thereof.

10. The process according to claim 6, wherein the yarn threaded on Bar B3 is a polylactic acid monofilament yarn having a diameter of 0.15 mm.