BIODEGRADABLE POLYLACTIC ACID HIGH STRENGTH FILAMENT YARN, MANUFACTURING METHOD THEREOF, MANUFACTURING METHOD OF WOVEN OR KNITTED FABRIC USING IT AND ITS USE

摘要

PURPOSE: A method for fabricating biodegradable polylactic acid high strength filament yarn is provided to decompose the yarn after use and to prevent environmental pollution. CONSTITUTION: A method for fabricating biodegradable polylactic acid high strength filament yarn comprises a step of repeating heating and cooling in a supply unit at 180-220°C, in a melting unit at 200-230°C, in an extrusion unit at 210-240°C, and in measuring unit at 220-250°C; and a step of uniformly stretching by melting polylactic acid resin. The tensile strength of the filament fiber is 4-8 g/d and the elongation is 20-50%.