| 摘要 |
PURPOSE:The titled cross-section fibers which are thermoplastic synthetic fibers having the cross-sectional shape consisting of many branches elongating from the central part and having a specific fineness of each fiber and aspect ratio and rich in dry feeling and with permanent set in fatigue, etc., removed. CONSTITUTION:Cross-section fibers which are thermoplastic synthetic fibers, e.g. polyethylene terephthalate, obtained by spinning and drawing 1 polyamide with preferably >=3.4 relative viscosity, more preferably a polyester with >=0.7 intrinsic viscosity, having a cross-sectional shape of each fiber 1 consisting of 3-5 branches 2 radially elongating from the central part and satisfying formulas I and II (De is the fineness of each fiber; A is the length of the above- mentioned branches 2 in the radial direction; B is the average transverse width of the above-mentioned branches 2; A/B is the aspect ratio of the above- mentioned branches 2). The above-mentioned aspect ratio is preferably >=4.0, more preferably >=4.5.
|
