PROBLEM TO BE SOLVED: To provide a fishing line used in water which requires diameter reduction for reducing pressure resistance due to water flow, abrasion resistance in order to prevent breakage by being rubbed in a rocky area, high tensile breaking strength, lightness, flexibility and rigidity.SOLUTION: Synthetic fiber multi-filament yarns having a certain mechanical-strength characteristic are used as a core part and the like constituting a fishing line while focusing attention on the fact that the strength of tensile breaking force of metal wire does not necessarily contribute to tensile breaking force of the fishing line composed of composite yarns comprising metal wires and synthetic fiber multi-filament yarns. In addition, a specific coating material is used while focusing attention on a fact that the outer diameter and the tensile breaking force of the fishing line vary depending on the kind of the coating material forming the coated part of the fishing line. Thus, lightweight, flexible and robust fishing lines can be provided.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】水中で用いられる釣糸は、水流による圧力抵抗を軽減する為の細径化と、岩場での擦れによる破断を防ぐ為の耐摩耗性と、高い引張破断力と、軽くて、柔軟で、丈夫な釣糸が求められる。【解決手段】金属線と合成繊維の複合糸から成る釣糸の引張破断力は、金属線の引張破断力の大きさが必ずしも寄与していないことに着目し、一定の機械的強度特性を有する合成繊維のマルチフィラメント糸を、釣糸を構成する芯部等に用いる。又、釣糸の被覆部を形成する塗料の種類により、釣糸の外径と引張破断力が変化することに着目し、特定の塗料を用いる。これらにより、軽くて、柔軟で、丈夫な釣糸が提供できることを目的とする。【選択図】図1
