抄録
A method of dispersing fine silica particles into polyester resin proposed by the authors was applied for the production of polyester fibers with deep and vivid color. Surface roughness with the dimension of the wavelength of light was introduced on silica hybrid polyester fibers through alkali etching. Although silica particles are dispersed uniformly in polyester pellets, the particles are aligned in the direction of fiber axis in the silica hybrid fibers. This uniaxial arrangement of silica particles leads to the formation of ridged surface after alkali etching. Quantitative analyses of the surface roughness in the direction transverse to the fiber axis and optical properties of the fibers revealed that the silica content of 3 wt% gives highest optical properties to the dyed fibers.
