POLYESTER MONOFILAMENT AND PROCESS FOR PRODUCING POLYESTER MONOFILAMENT

摘要

A polyester monofilament comprising a high-viscosity polyester as a core component and a low-viscosity polyester as a sheath component, the polyesters having been combined together in a core-sheath arrangement. The polyester monofilament has a fineness of 3.0-13.0 dtex, a breaking strength of 6.0-9.3 cN/dtex, a strength at 10% elongation of 5.0-9.0 cN/dtex, a difference in wet heat stress in the filament-length direction of 3.0 cN or less, and a residual torque value of at most 4 turns per m. Provided is a process for producing a polyester monofilament by a direct spinning/drawing method in which two ingredients, i.e., a high-viscosity polyester as a core component and a low-viscosity polyester as a sheath component, are melt-extruded from a spinnert while being combined together in a core-sheath arrangement, and cooled and solidified, and the resultant extrudate filament is continuously drawn and wound up.