| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a spun-dyed polyester fiber, excellent in processability when weaving a seat belt and capable of providing the seat belt, having a high strength and excellent in durability, especially the durability at very low temperatures. SOLUTION: This spun-dyed polyester fiber is obtained by applying an oil agent containing (A) 2-20wt.% polyester-based polymer having >=5,000 molecular weight and (B) 1-10wt.% silicone compound having >=10,000cSt viscosity at 25 deg.C in an amount of 0.4-0.9wt.% based on the fiber weight to a spun-dyed polyester fiber, containing 0.1-1wt.% pigment and having 30-40 silk factor.</p> |
