| 摘要 |
<p>Polyolefin fibers comprising a surface layer with a low orientation region and an inner layer with a high orientation region, characterized in that an orientation parameter of the low orientation region measured by a Raman spectroscopy is smaller than that of the high orientation region by not less than 2.2 and not more than 8.0. When these polyolefin fibers are used, a nonwoven fabric having a high strength and an excellent feeling can be provided. Since the fibers have a wide processing temperature range for the production of a nonwoven fabric by the point bonding method, a nonwoven fabric of a stable quality can be provided.</p> |
