COPOLYESTER HEAT SHRINKABLE FILM

摘要

PURPOSE: A copolyester heat shrinkable film is provided to prevent the deformation and shrinkage of a label caused by high temperature drink since heat resistance is enhanced. CONSTITUTION: A copolyester heat shrinkable film comprises a copolyester resin, wherein a contraction opening temperature is 60 °C or greater, a maximum heat shrinkage rate at 60-70 °C is 2% or less, and a maximum heat shrinkage rate at 90-100 °C is 50-90%. The copolyester resin has a structure where an acid part induced from an acid component and a diol part induced from a diol component are repeated, by copolymerizing the acid component containing terephthalic acids and the diol component containing ethylene glycol and isosobide represented by chemical formula 1.