| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyamide multifilament that can improve dyeability even without using a specific dyeing processing technology and is especially suitable for an industrial material use, and to provide a technology for inexpensively producing the polyamide multifilament in good fiber-forming properties. SOLUTION: The polyamide multifilament includes≥80% of a single filament having a relative viscosity in sulfuric acid of 3.0-4.0, an amino terminal group amount of 4.0×10<SP>-5</SP>-5.5×10<SP>-5</SP>mol/g, and≥50% of the circumferential length of a cross-section which is covered with spherulites. The polyamide multifilament has≥80% the circumferential length of a cross-section which is covered with spherulites. The polyamide multifilament includes nylon 6 as the polyamide. The polyamide multifilament has a total fineness of multifilament of 200-2,000 dtex, a single filament fineness of 4-30 dtex, a strength of 6.0-8.0 cN/dtex, a boiling water shrinkage percentage of 8-15%, and a number of entanglement of 5-30 interlaces/m. COPYRIGHT: (C)2008,JPO&INPIT
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