Tubular woven fabric

Patent metadata

Field	Value
Publication number	US-2021007838-A1
Application number	US-201716340081-A
Country	US
Kind code	A1
Filing date	Sep 29, 2017
Priority date	Oct 7, 2016
Publication date	Jan 14, 2021
Grant date	—

Abstract

A tubular woven fabric is useful as a transport hose for a fluid or a powder, as a protective hose for linear bodies such as wires, cables and conduits, as a tubular filter, or as a base material of a vascular prosthesis. The tubular woven fabric includes warp yarns and weft yarns interwoven with each other, the tubular woven fabric having an outer diameter with a variation of within 10% along the warp direction and satisfying the formula:
( L 2− L 1)/ L 1≤0.1.

First claim

1 .- 17 . (canceled)

18 . A tubular woven fabric comprising warp yarns and weft yarns interwoven with each other, the tubular woven fabric having an outer diameter with a variation of within 10% along a warp direction and satisfying formula (1):
( L 2 −L 1)/ L 1≥0.1   (1)

wherein
L1 is a gauge length of the tubular woven fabric when compressed in the warp direction by applying a stress of 0.01 cN/dtex, as determined after the outer diameter of the tubular woven fabric is measured without applying stress to the tubular woven fabric to determine a maximum outer diameter and then gauge marks are drawn around an outer circumference of the tubular woven fabric so that the gauge marks are separated by a length of five times the maximum outer diameter of the tubular woven fabric; and
L2 is a gauge length of the tubular woven fabric when elongated in the warp direction by applying a stress of 0.01 cN/dtex, as determined after the outer diameter of the tubular woven fabric is measured without applying stress to the tubular woven fabric to determine a maximum outer diameter and then gauge marks are drawn around an outer circumference of the tubular woven fabric so that the gauge marks are separated by a length of five times the maximum outer diameter of the tubular woven fabric.

19 . The tubular woven fabric according to claim 18 , having a change index (c) of 0.03 or more and less than 0.2, as determined by formula (2):
Change index, c =( a−b )/ a   (2)

wherein
a is a maximum outer diameter of the tubular woven fabric when compressed in the warp direction by applying a stress of 0.01 cN/dtex, and
b is a minimum outer diameter of the tubular woven fabric when elongated in the warp direction by applying a stress of 0.01 cN/dtex.

20 . The tubular woven fabric according to claim 18 , having an inner surface with an irregularity of 100 μm or less.

21 . The tubular woven fabric according to claim 18 , having no circumferential corrugations.

22 . The tubular woven fabric according to claim 18 , wherein the warp and weft yarns constituting the tubular woven fabric are synthetic fiber yarns.

23 . The tubular woven fabric according to claim 22 , wherein the synthetic fiber yarns constituting the tubular woven fabric are non-elastic polyester yarns.

24 . The tubular woven fabric according to claim 22 , wherein the synthetic fiber yarns serving as the warp yarns constituting the tubular woven fabric are multifilament yarns containing filaments, and a part or all of the filaments have a diameter of 5 μm or less.

25 . A vascular prosthesis comprising the tubular woven fabric according to claim 18 as a base material.

26 . A vascular prosthesis comprising the tubular woven fabric according to claim 18 as a base material, the base material having an inner surface having a layer of an antithrombogenic material.

27 . The vascular prosthesis according to claim 26 , wherein the antithrombogenic material contains a sulfur-containing anionic compound having anticoagulant activity.

28 . The vascular prosthesis according to claim 26 , wherein the antithrombogenic material contains a cationic polymer containing, as a monomer unit, a compound selected from the group consisting of alkylene imines, vinyl amines, allylamine, lysine, protamines, and diallyl dimethyl ammonium chloride, and the cationic polymer is covalently bound to warp and weft yarns constituting the tubular woven fabric having an inner surface to be in contact with blood.

29 . A vascular prosthesis comprising the tubular woven fabric according to claim 25 as a base material, the base material having an outer surface having a layer of a bioabsorbable material.

30 . The vascular prosthesis according to claim 29 , having a kink radius of 15 mm or less.

31 . The vascular prosthesis according to claim 29 , having a water permeability of 10 mL/cm 2 ·min or less as measured by applying a pressure of 120 mmHg to an inner surface of the vascular prosthesis at 25° C.

32 . The vascular prosthesis according to claim 29 , wherein the bioabsorbable material is a homopolymer or copolymer containing a monomer unit selected from the group consisting of lactic acid, glycolic acid, caproic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, maleic acid, fumaric acid, ethylene glycol, propylene glycol, vinylpyrrolidone and vinyl alcohol.

33 . The vascular prosthesis according to claim 29 , wherein the bioabsorbable material is a polysaccharide or a protein.

34 . The vascular prosthesis according to claim 33 , wherein the protein is selected from the group consisting of collagen, atelocollagen and gelatin.

Assignees

• Toray Industries

Inventors

• Tanaka Nobuaki
• Tsuchikura Hiroshi
• Yamada Satoshi
• Koyamatsu Yuichi
• KOGAWA Taisuke
• Sakaguchi Yuka
• Tanahashi Kazuhiro

Classifications

• D10B2401/024

  soluble · CPC title

• D10B2211/06

  Collagen fibres · CPC title

• A61L33/027

  Other specific inorganic materials not covered by A61L33/022 or A61L33/025 · CPC title

• A61L33/0011

  Anticoagulant, e.g. heparin, platelet aggregation inhibitor, fibrinolytic agent, other than enzymes, attached to the substrate · CPC title

• A61L27/58

  Materials at least partially resorbable by the body · CPC title