Patent ID: 9074042
Filing Date: 2015-07-07
Classification: C08G,C08J,C09J

Abstract:
1. A packaging film, including a lactide copolymer including two or more block copolymerized repeating units of Chemical Formula 1 in which hard segments of polylactide repeating units are connected to both ends of soft segments of polyether polyol repeating unit, wherein the block copolymerized repeating units are connected to each other through the intermediation of urethane connecting groups derived from polyvalent isocyanate compound of which the average equivalent of isocyanate group per a molecule is 2.2 to 2.8, wherein the polyvalent isocyanate compound includes a diisocyanate compound and a polyvalent isocyanate compound of which the equivalent of isocyanate group is 3 or more, and wherein the lactide copolymer has a tensile strength of 348 to 458 kg/cm wherein in Chemical Formula 1, D is a C