False-twisted low-fused polyester yarn and multilayer-structure woven or knitted fabric
AssigneeToray Industries, Inc.
InventorsHiroaki Date, Naoki Oda, Tomoko Ito, Kouji Nishiya
Life of this patent
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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%.
Claims17
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%.
Dependencies are inferred from the claim text.