Woven fabric and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-11578435-B2
Application number	US-201816769606-A
Country	US
Kind code	B2
Filing date	Nov 8, 2018
Priority date	Dec 15, 2017
Publication date	Feb 14, 2023
Grant date	Feb 14, 2023

Abstract

It is an object to provide a woven fabric which can stably form a folding shape superior in shape retention and followability and which can be sewn while maintaining the folding structure, and also to provide a method for manufacturing the same. There is provided a woven fabric having pleats, wherein the height of the pleats is 2 to 10 times the average diameter of yarns arranged in the same direction as the pleats.

First claim

The invention claimed is:

1. A woven fabric having a pleat, wherein
the woven fabric is a weft-double woven fabric or warp-double woven fabric in which warps or wefts are arranged such that they pass between two wefts or warps having a double-layer structure in a pleated state, and the woven fabric has a single-laver structure in an un-pleated state when sides of the woven fabric are pulled,
the pleat is in a state in which a mountain part and a valley part are formed alternately and repeatedly on both the front and back sides of a textile and the mountain parts of the front side of the textile are the valley parts on the back side of the textile, and
the pleat has a height of 2 to 10 times an average diameter of a yarn arranged in the same direction as the pleat.

2. The woven fabric according to claim 1 , wherein 60% by mass or more of the yarn constituting the woven fabric is a thermoplastic fiber.

3. The woven fabric according to claim 2 , wherein the thermoplastic fiber is an inelastic fiber.

4. The woven fabric according to claim 3 , wherein the inelastic fiber a polyester fiber.

5. The woven fabric according to claim 1 , wherein part or all of the yarns constituting the woven fabric are multifilaments composed of filaments having a single yarn diameter of 6 μm or less.

6. The woven fabric according to claim 1 , wherein the woven fabric is used for medical use.

7. The woven fabric according to claim 1 , wherein the woven fabric is in a tubular form.

8. An artificial blood vessel comprising the woven fabric in a tubular form according to claim 7 as a substrate.

9. A method for manufacturing the woven fabric according to claim 1 , comprising steps (a) to (d):
(a) a step of using a yarn to be removed as part of warps or wefts and weaving a fabric while folding a yarn arranged in parallel with the yarn to be removed,
(b) a heat treatment step of setting a crimp of the folded yarn,
(c) a step of removing the yarn to be removed after the step (b),
(d) a heat treatment step of setting the crimp of the folded yarn after the step (c).

Assignees

• Toray Industries

Inventors

• Yamada Satoshi
• Tanaka Nobuaki
• Tsuchikura Hiroshi

Classifications

• D03D15/68

  Scaffolding threads, i.e. threads removed after weaving · CPC title

• D03D3/08

  Arched, corrugated, or like fabrics · CPC title

• A61F2/06

  Blood vessels · CPC title

• D06M11/00

  Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising (D06M10/00 takes precedence) · CPC title

• D03D17/00 Primary

  Woven fabrics having elastic or stretch properties due to manner of weaving (fabrics using stretchable or elastic threads D03D15/56) · CPC title