False-twisted low-fused polyester yarn and multilayer-structure woven or knitted fabric

Patent metadata

Field	Value
Publication number	US-9957647-B2
Application number	US-201314409331-A
Country	US
Kind code	B2
Filing date	Jun 21, 2013
Priority date	Jun 22, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

A false-twisted low-fused polyester yarn has a non-untwisted part having a twist in a false-twist direction, an over-untwisted part having a twist in a direction opposite to the false-twist direction, and a non-twisted crimped part having no twist, alternately disposed along the longitudinal direction of the yarn, the average length of the non-untwisted part being no more than 7 mm, the average length of the over-untwisted part being at least 7 mm, and the degree of fusion-bonding in the yarn longitudinal direction being no more than 50%.

First claim

The invention claimed is:

1. A false-twisted low-fused polyester yarn comprising:
a non-untwisted part having a twist in a false-twist direction;
an over-untwisted part having a twist in a direction opposite to the false-twist direction; and
a non-twisted crimped part having no twist,
wherein the parts are alternately disposed along a longitudinal direction of the yarn, an average length of the non-untwisted part is 7 mm or less, an average length of the over-untwisted part is 7 mm or more, a degree of fusion-bonding in the longitudinal direction of the yarn is 50% or less, and a porosity of a cross section of the non-untwisted part is 10% to 47%.

2. The false-twisted low-fused polyester yarn according to claim 1 , wherein a water absorption height is 10 mm to 50 mm.

3. The false-twisted low-fused polyester yarn according to claim 1 , wherein the porosity is 10% to 40%.

4. The false-twisted low-fused polyester yarn according to claim 1 , wherein the average length of the non-untwisted part is 1 mm or more.

5. The false-twisted low-fused polyester yarn according to claim 1 , wherein the average length of the over-untwisted part is 40 mm or less.

6. A multilayer-structure woven or knitted fabric comprising:
a top face made from the false-twisted low-fused polyester yarn according to claim 1 ; and
a back face made from a fiber having a water absorption height less than that of the false-twisted low-fused polyester yarn.

7. The multilayer-structure woven or knitted fabric according to claim 6 , wherein the false-twisted low-fused polyester yarn is disposed in a network on the top face, while the fiber having the water absorption height less than that of the false-twisted low-fused polyester yarn is disposed at another part on the top face.

8. A multilayer-structure woven or knitted fabric comprising a back layer or a middle layer of the fabric comprising the false-twisted low-fused polyester yarn according to claim 1 .

9. The multilayer-structure woven or knitted fabric according to claim 6 , wherein the fabric is a knitted fabric, and a fiber area per unit area is 90% or more and an air permeability is 150 cc/cm 2 /sec or more.

10. The multilayer-structure woven or knitted fabric according to claim 6 , wherein the fabric is a woven fabric, and a fiber area per unit area is 90% or more and an air permeability is 100 cc/cm 2 /sec or more.

11. The multilayer-structure woven or knitted fabric according to claim 6 , wherein anti-transparency of a white fabric is 80% or more and an Ultraviolet Protection Factor (UPF) of the multilayer-structure woven or knitted fabric is 30 or more.

12. The false-twisted low-fused polyester yarn according to claim 2 , wherein a porosity of a cross-section of the non-untwisted part is 10% to 70%.

13. The false-twisted low-fused polyester yarn according to claim 2 , wherein the average length of the non-untwisted part is 1 mm or more.

14. The false-twisted low-fused polyester yarn according to claim 3 , wherein the average length of the non-untwisted part is 1 mm or more.

15. The false-twisted low-fused polyester yarn according to claim 2 , wherein the average length of the over-untwisted part is 40 mm or less.

16. The false-twisted low-fused polyester yarn according to claim 3 , wherein the average length of the over-untwisted part is 40 mm or less.

17. The false-twisted low-fused polyester yarn according to claim 4 , wherein the average length of the over-untwisted part is 40 mm or less.

Assignees

• Toray Industries

Inventors

• Date Hiroaki
• Oda Naoki
• Ito Tomoko
• NISHIYA Kouji

Classifications

• D03D11/00

  Double or multi-ply fabrics not otherwise provided for · CPC title

• D02G3/26

  with characteristics dependent on the amount or direction of twist · CPC title

• D04B1/16

  synthetic threads · CPC title

• D04B1/00

  Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes · CPC title

• D10B2331/04

  polyesters, e.g. polyethylene terephthalate [PET] · CPC title