| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for producing lyotropic liquid crystal polymer multifilament, by which the elastic modulus of the lyotropic liquid crystal polymer yarn formed of the multifilament can be improved, while preventing the occurrence of single fiber breakage. <P>SOLUTION: This method for producing the multifilament, including extruding a dope made of a lyotropic liquid crystal polymer and an acidic solvent, includes spinning the dope, washing the spun fibers, temporarily winding up the washed fibers in a water content state of≥15%, drying the fibers in the wound state until to reach a water content of≤10%, imparting an oil to the dried fibers, and then applying a thermal treatment to the fibers under a tension. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
