abstract |
PROBLEM TO BE SOLVED: To provide a rayon-based fiber containing far-infrared ray-emitting particles, which is capable of satisfactorily radiating far-infrared rays having a wavelength most effective for the human body and is excellent in heat retention, and a method for producing the same. An object of the present invention is to provide underwear containing the fibers. SOLUTION: Alumina (Al 2 O 3 ), silica (Si) O 2 ), magnesia (MgO), calcium oxide (Ca O), one or more metal oxides selected from titanium dioxide (TiO 2 ), and platinum (Pt). |