PROBLEM TO BE SOLVED: To provide a dental floss and a method for manufacturing the same, using an extra fine fiber multi-filament, having excellent flossing effect and use feeling and hardly causing scuffing and breakage of yarn.SOLUTION: In this dental floss, a sheath yarn Y mainly composed of heat fused yarn and having a higher average single yarn fineness than a core yarn X and a higher heat contraction rate than the core yarn X is wound spirally with spaces to make a number of turns of 50-500 T/m in the periphery of the core yarn X formed of an extra fine fiber multi-filament with an average single yarn fineness of 1.1 dtex or smaller, and the core yarn X and the sheath yarn Y are partially fixed to each other by heat fusion.COPYRIGHT: (C)2010,JPO&INPIT【課題】極細繊維マルチフィラメントを用い、優れた清拭効果と使用感を備え、しかも毛羽立ちや糸切れが発生することのないデンタルフロスおよびその製法を提供する。【解決手段】平均単糸繊度1.1dtex以下の極細繊維マルチフィラメントからなる芯糸Xの周囲に、熱融着糸を主成分とし、上記芯糸Xより平均単糸繊度が太く、かつ芯糸Xより熱収縮率が高い鞘糸Yが、50~500T/mの巻き数となるよう隙間をあけてらせん状に巻回されており、上記芯糸Xと鞘糸Yとが、熱融着によって部分的に固定されている。【選択図】図1
