| 摘要 |
PROBLEM TO BE SOLVED: To provide a method and device for manufacturing stereocomplex polylactic acid and a molded article thereof, the stereocomplex polylactic acid being small in hue change, excellent in productivity, easy to manufacture and manufacturable with a simple structure.SOLUTION: Poly-L-lactic acid and poly-D-lactic acid are supplied to an extruder. A resin plasticizing gas is pressed from a gas injection port 6 into the poly lactic acids in the extruder in a subcritical or supercritical state so as to knead the poly-L-lactic acid and the poly-D-lactic acid in the presence of the resin plasticizing gas. The resin plasticizing gas is degassed from produced stereocomplex polylactic acid by vent ports 7, 8 provided for the extruder, and extrusion molded articles are manufactured by carrying out extrusion-molding with a die 10 mounted to the extruder. |
