| 摘要 |
Acrylic synthetic fibers excellent in styleability and heat resistance. The fibers have knot-form protrusions on the surface, and have a surface level difference caused by the knots of 5.0 to 15.0 mum, a knot interval of 0.05 to 0.5 mm, a flexural rigidity of 7.0x10-7 to 10.0x10-7 N.m2/m, and a torsional rigidity of 5.0x10-9 to 10.0x10-9 N.m2. The acrylic synthetic fibers comprise an acrylic copolymer having an acrylonitrile content of 60 mol% or higher, a content of sulfur atoms derived from a sulfo-containing vinyl monomer of 0.15 to 0.50 wt.%, and a specific viscosity of 0.20 to 0.50. |
