| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyester fiber having excellent raising property when producing napped fabric and suitable for producing napped fabric having both of napping property and soft feeling and excellent in flame retardance and a napped fabric using the fiber. SOLUTION: This polyester fiber is mainly composed of a polyester and simultaneously satisfies the following characteristics (1): 500<=P<=50,000; (2): 2%<=ε0.2 <=30%; (3): ISa /ISb >=0.9 [wherein P is phosphorus content (ppm);ε0.2 is integrated parameter of a structure; ISa is an initial tensile modulus (cN/dtex) after boiling water/dry heat treatment; ISb is an initial tensile modulus (cN/dtex) before boiling water/dry heat treatment].
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