| 摘要 |
By dissolving a vinyl alcohol polymer (A) and an incompatible vinyl polymer (B), preferably an acrylonitrile polymer in a common solvent to prepare a spinning stock solution of a phase separation structure wherein the polymer (B) is present at particle sizes of 2 to 50 mu m, and wet spinning or dry-wet spinning the resulting spinning stock solution in a solidifying bath containing a mixture of an organic solvent capable of solidifying both the polymers (A) and (B) and the solvent of the spinning stock solution at a weight ratio of 25/75 to 85/15, thereby drawing the resulting yarn by 8-fold or more, a fiber is provided; and from the fiber can be produced a fibril with good hydrophilicity, a higher strength, and excellent heat fusion resistance, along with excellent wiping performance, filtering performance, micro-particle capturing properties and reinforcing performance, readily, stably and inexpensively. <IMAGE> |
