PROBLEM TO BE SOLVED: To provide a functional flocculent resin fiber obtained by providing a thermoplastic resin long fiber with various functions, and a method for producing the functional flocculent resin fiber.SOLUTION: The functional flocculent resin fiber of the present invention is prepared by adhering at least any of calcium hydroxide powder, nanosilver particles, clay mineral powder, conductive powder, carbon powder, and a surfactant to, or blending it with a thermoplastic resin long fiber having an average fiber diameter of 1 to 50 μm； in particular, an average particle diameter of the calcium hydroxide powder is set to 0.3 to 100 μm, and an average particle diameter of the nanosilver particles is set to 0.001 to 0.005 μm； and the nanosilver particles are adhered to the calcium hydroxide powder.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】熱可塑性樹脂長繊維に各種機能を持たせた機能性綿状樹脂ファイバ、この機能性綿状樹脂ファイバの製造方法を提供すること。【解決手段】本発明の機能性綿状樹脂ファイバは、平均ファイバ径が１μｍ～５０μｍである熱可塑性樹脂長繊維に、水酸化カルシウム粉末、ナノシルバー粒子、粘土鉱物粉末、導電性粉末、カーボン粉末、及び界面活性剤の少なくともいずれかを付着させ又は混練させたことを特徴とし、特に水酸化カルシウム粉末の平均粒径を０．３μｍ～１００μｍとし、ナノシルバー粒子の平均粒径を０．００１μｍ～０．００５μｍとし、水酸化カルシウム粉末にナノシルバー粒子を付着させる。【選択図】 図１
