MOLDING OF POLYLACTIC ACID-BASED POLYMER AND METHOD FOR MOLDING THEREOF

摘要

PROBLEM TO BE SOLVED: To obtain a biodegradable molding which shows excellence in shock resistance and deep drawability into a cylindrical shape. SOLUTION: The molding of a polylactic acid-based polymer is obtained by heating a sheet of a polylactic acid-based polymer having a surface orientation degree (ΔP) of 3.0×10-3 to 30×10-3 in a temperature range from not lower than a glass transition temperature (Tg) of the polylactic acid-based polymer to not higher than (Tg+50 deg.C) and then deep-drawing the sheet by use of a press provided with a punch heated in a temperature range from the lower than a glass transition temperature (Tg) of the polylactic acid-based polymer to not higher than (Tg+50 deg.C).