Tubular woven fabric
AssigneeToray Industries, Inc.
InventorsNobuaki Tanaka, Hiroshi Tsuchikura, Satoshi Yamada, Yuichi Koyamatsu, Taisuke Kogawa, Yuka Sakaguchi, Kazuhiro Tanahashi
Life of this patent
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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: (L2−L1)/L1≤0.1.
Claims13
A tubular woven fabric comprising a warp yarn A and weft yarns consisting of a weft yarn C and a weft yarn D, wherein warp yarns consisting of the warp yarn A and a warp yarn B and weft yarns consisting of the weft yarn C and the weft yarn D are interwoven with each other to obtain the tubular woven fabric by removal of the warp yarn B after weaving, wherein the warp yarn A, the weft yarn C and weft yarn D are non-elastic polyester yarns, and the warp yarn B is a soluble yarn made of fibers soluble in at least one of water or an alkaline solution, and the weft yarn C is arranged in the inner layer of the tubular woven fabric, and the weft yarn D is arranged in the outer layer of the tubular woven fabric, and the filaments constituting the weft yarn D have a larger diameter than the filaments constituting the weft yarn C, and satisfying Formula (1):
- (L2−L1)/L1≥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,
- wherein the warp yarns A are multifilament yarns containing filaments, and a part or all of the filaments have a diameter of 5 μm or less.
Dependencies are inferred from the claim text.