main characteristics:first, it is unpolluted: it does not contain the chloro-fluoride which is harmful to the atmosphere and human. and it is conforming to the iso14001 international environmental protection requirements. second, it has a long work life: it is antiaging, chillinessproof, anti-heat,antidryness flameresisten, anlistatig , transparent, silk fleeing free, distort free and ultraviolet ray resisting.