| abstract |
The present invention relates to a packaging film comprising a lactide copolymer which has superior physical properties such as mechanical properties, transparency, and workability, and superior flexibility and which has no drawbacks of contamination, toxicity, or the like. Thus, the packaging film of the present invention can be preferably used as food packaging or the like. The packaging film comprises a lactide copolymer which includes two or more predetermined block copolymerizing repeating units in which hard segments of polylactide repeating units bond to both ends of soft segments of polyether polyol repeating units. The block copolymerizing repeating units are interconnected by means of a urethane linker group which is derived from a polyvalent isocyanate compound in which an equivalent of an average isocyanate group per molecule is between 2 and 3. |