POLYLACTIC ACID RESIN COMPOSITION AND A PACKAGING FILM

摘要

The present invention relates to a polylactic acid resin composition useful as a packaging material which has not only improved flexibility but also superior external appearance and superior properties such as mechanical property, transparency, heat resistance, anti-blocking property, workability of a film, and the like, and a packaging film including the same.;The polylactic acid resin composition comprises a polylactic acid resin including a hard segment comprising a polylactic acid repeating unit and a soft segment comprising a polyurethane polyol repeating unit in which polyether polyol repeating units are linearly linked via a urethane bond; and a specific content of antioxidant.

主权项

1. A polylactic acid resin composition, comprising:
a polylactic acid resin including a hard segment comprising a polylactic acid repeating unit of the following Chemical Formula 1, and a soft segment comprising a polyurethane polyol repeating unit in which polyether polyol repeating units of the following Chemical Formula 2 are linearly linked via a urethane bond; and an antioxidant of 100 to 1500 ppmw per the amount of the monomers for forming the polylactic acid repeating unit: wherein A is a linear or branched alkylene of 2 to 5 carbon atoms, m is an integer of 10 to 100, and n is an integer of 700 to 5000.