POLYLACTIC ACID RESIN AND FILM FOR PACKAGING COMPRISING THE SAME

摘要

PURPOSE: A polylactic acid resin and a packing film including thereof are provided to enhance the polylactic acid shows the biodegradation property of the polylactic acid characteristic. CONSTITUTION: A polylactic acid comprises block copolymers of a soft segment and a hard segment. The hard segment includes polylactic acid recurring units which are represented by chemical formula 1. The soft segment includes polyurethane polyol recurring units by using urethane bond as an intermediate which is formed by a reaction of terminated hydroxy group with diisocyanate compound. In the chemical formula, A is C2-5 linear or branched alkylene group, m is an integer of 10-100, and n is an integer of 700-5000.