| 摘要 |
<p>A composite fiber of polytrimethylene terephthalate is composed of a single yarn in which two kinds of polyester components are bonded into a side-by-side type or an eccentric sheath-core type. At least one of the components constituting the single yarn contains 90mol% or more of repeating unit of trimethylene terephthalate. A lay of the composite fiber is wound in a package by the amount of 2 kg or more. The composite fiber is characterized in that (1) the difference between the winding diameter of the lay at the ear part of the package and that at the central part of the package is 10 mm or less, (2) the winding width of the package is 60 to 250 mm and the winding diameter of the package is 100 to 400 mm, and (3) the difference between the dry heat shrinkage stress of the composite fiber wound at the ear part of the package and that at the central part is 0.05 cN/dtex or less.</p> |
