| abstract |
(57) [Summary] [Problem] Bleedout is unlikely to occur, To provide a production method capable of imparting a further excellent impact resistance to a lactic acid-based polymer sheet having excellent flexibility, transparency and impact resistance. SOLUTION: It has a lactic acid unit (I) and a polyester unit (II) in a weight ratio of 10:90 to 90:10, a weight average molecular weight of 10,000 or more, and a glass transition temperature of 60 ° C. After hot-melting a polyester composition containing the following polylactic carboxylic acid (IV) and a polyhydroxy carboxylic acid (V) comprising a lactic acid-based polyester (III), at least one pair of two A method for producing an impact-resistant lactic acid-based polymer sheet, wherein the sheet is cooled and solidified while applying a pressure of 1 megapascal or more between the rolls to form a sheet. |