Drawing of Poly (L-lactide-co-ε-caprolactone) Monofilament under the Heating of Air-heater and/or Laser Irradiation

Abstract

Poly (L-lactide-co-ε-caprolactone) monofilament was drawn with three ways of heating methods, those are air heater heating, CO₂ laser irradiation, and laser irradiation after heater pre-heating. The mechanical properties and diameter deviation of the drawn filaments were analyzed. The lowest drawing stress and the least diameter deviation were obtained for the heating of laser irradiation after heater pre-heating. Moreover, only by the heating of laser irradiation after heater pre-heating, the drawing point could be fixed even for draw ratio of 4. And after the 3-step drawing, the filament which have the maximum strength of 651MPa was obtained by the heating method.