Abstract: The colored luminous fibers were prepared by melt spinning process adding colored pigments and long afterglow luminous material into polyamide fiber. Photoluminescence spectroscopy was used to investigate the effects of pigments on spectral properties of the colored luminous fibers. The results revealed that yellow and green pigments had significantly effect on the excitation spectra of luminous fibers, which result in the excitation spectra of yellow and green luminous fibers getting closer to visible light. The red luminous fiber emission spectrum was red-shifted, while the blue luminous fiber emission spectrum was little blue-shifted. Afterglow intensity of colored luminous fibers decreased approximately in exponential with time. The average deterioration rate of white and yellow luminous fibers brightness was larger than that of other colored luminous fibers, but their brightness maintained the highest value. The intensity of blue and red luminous fibers was much reduced because of the addition of blue and red pigments.

Key words: luminous fiber, polyamide 6, luminous intensity, afterglow intensity