The afterglow intensity of luminous nonwoven con- taining SrAl2O4:Eu2+,Dy3+ of 5 wt.% was apparently lower than other nonwoven. And the initial afterglow in- tensity of luminous nonwoven containing SrAl2O4:Eu2+, Dy3+ of 10 wt.% and 15 wt.% were similar, but luminous nonwoven containing SrAl2O4:Eu2+,Dy3+ of 15 wt.% had poor spun-bonded characteristics. The afterglow intensity decreased rapidly[10,11], and the afterglow of strontium aluminate was stronger than the luminous nonwoven at
the beginning since the nonwoven absorbed less energy in the light as a result that the polymeric material is ob- structive. The phenomenon of afterglow decay is a fea- ture of the electronic trapping in the luminescent material. The luminescent material will store the energy to its electronic trap when in the condition of light. Then the material released the energy in the electronic trap slowly and formed afterglow properties. The energy becomes scarcer with the time going and the afterglow intensity of material's decrease.