Back to results
US 6,503,623 B1Granted
Yarn comprising polytrimethylene terephthalate
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsKazuto Oue, Hiroshi Yamazaki
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeAsahi Kasei Kabushiki Kaisha
InventorsKazuto Oue, Hiroshi Yamazaki
Estimating the term…
The present invention provides a yarn composed of polytrimethylene terephthalate fibers, particularly polytrimethylene terephthalate multifilamentary fibers having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 2000 to 22000 dtex. Further, the present invention provides a racket string composed of polytrimethylene terephthalate multifilamentary fibers having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 7000 to 22000 dtex, and a musical instrumental string composed of polytrimethylene terephthalate multifilamentary fibers having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 2000 to 14000 dtex. The yarn according to the present invention is high in strength, elastic recovery and stress-retaining ratio as well as excellent in water resistance, softness and homogeneity of yarn properties. The racket string according to the present invention can be set across a racket frame, for example, for tennis or other, games under a high tension, whereby high resilience is obtainable when the string is set, and maintained for a long time. Also, this racket string is excellent in impact resistance, durability and water resistant. The musical instrumental string is stable in tuning over time and with a change in humidity as well as excellent in tunability.
A yarn comprising polytrimethylene terephthalate multifilamentary fibers substantially without crimp having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 2000 to 22000 dtex, said yarn having a stress-retaining ratio at a stress of 49.0 N of 70% or more and an elastic recovery of 70% or more.
A racket string comprising polytrimethylene terephthalate multifilamentary fibers without crimp having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 7000 to 22000 dtex, said string having a stress-retaining ratio at a stress of 49.0 N of 70% or more and an elastic recovery of 70% or more.
A musical instrumental string comprising polytrimethylene terephthalate multifilamentary fibers having a single-fiber size in a range from 1 to 56 dtex, which are collected together to have a total size in a range from 2000 to 14000 dtex.
Dependencies are inferred from the claim text.