| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester composite fiber which comprises a polyalkylene terephthalate as a fiber-forming component and isophthalic acid as an acid component and provides a nonwoven fabric having good hand-cutting properties.SOLUTION: A composite fiber consists of a fiber-forming component and a heat-adhesive component. The fiber-forming component consists of a polyalkylene terephthalate having a melting point of 220°C or higher and an intrinsic viscosity of 0.30-0.55dL/g, and the heat-adhesive component consists of a copolymerized polyester of a melting point of 110-200°C or a glass transition temperature of 50-110°C. In the composite fiber, the fiber-forming component and the heat-adhesive components are converted to a composite so that at least the heat-adhesive component is exposed in the surface, and the composite fiber has a single fiber fineness of 0.01-1.5 dtex. |
