| abstract |
PROBLEM TO BE SOLVED: To provide a lactic acid-based resin sheet having biodegradability, physical properties similar to OPP, excellent heat resistance and wet heat durability, and a method for producing the same. Provided is a lactic acid-based resin composition to be used. SOLUTION: The lactic acid-based resin composition contains, as a main component, 67% to 96% by mass of the lactic acid-based resin and a boiling point at normal pressure of 220 ° C. or more, or 5 Torr to 10 T. 4% to 33% by mass of a plasticizer having a boiling point at orr of 170 ° C. or higher. The lactic acid-based resin sheet is obtained by stretching a sheet made of the lactic acid-based resin composition in at least one direction, has a storage modulus at 20 ° C of 500 MPa to 3,000 MPa, and has a temperature of 120 ° C. It is preferable that the heat shrinkage after heating for 15 minutes at TD and MD are both 10% or less. |