抄録
To evaluate the light deterioration in sapphire mink guard hair, the irradiated hair was examined by the mechanical measurement and surface observation. A deterioration of hair by irradiation indicating the mobility increase can be detected as an increase in tan δ in a temperature region from 150°C to 220°C by the dynamic viscoelasticity measurement. The observation by scanning electron microscope (SEM) revealed that light deterioration in mink hair can be evaluated as adhesion of particles, melted scale structure of tip portion, cracks running in the axial direction by inflection, or transverse cracks at tensile break.
