| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a spinning stock solution of polyacrylonitrile-based fibers which is excellent in balance of shearing viscosity and spinnability, and makes a PAN (polyacrylonitrile)-based polymer in the spinning stock solution have a maximum concentration as much as possible, and to provide a method for producing the spinning stock solution of the polyacrylonitrile-based fibers. Ž<P>SOLUTION: The spinning stock solution of the polyacrylonitrile-based fibers is provided which contains 13-25 mass% polyacrylonitrile-based polymer having a mass-average molecular weight of 300,000-1,000,000, and containing 0.002-0.2 mass% of a polymer having a molecular weight of 3,000,000 or more, and 0.005-0.1 mass% of a polymer having a molecular weight of 20,000 or less. Further, the method for producing the spinning stock solution of the polyacrylonitrile-based fibers is provided. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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