HEAT-SHRINKABLE POLYESTER FILM

摘要

PROBLEM TO BE SOLVED: To provide a heat-shrinkable polyester film extremely reduced in the generation of wrinkles, shrink irregularity and strain after the shrinkage of the heat-shrinkable film, excellent in perforation cutting properties and suitable for use in a label. SOLUTION: In a heat-shrinkable polyester film, a hot water shrinkage ratio in a main shrinkage direction is 20% or more under a 70 deg.C/5 sec condition and 35-55% under a 75 deg.C/5 sec condition and 50-60% under a 80 deg.C/5 sec condition and the generation ratio of breaking elongation of 20% or less is 10% or less in the direction crossing the main shrinkage direction after 5% shrinkage in 75 deg.C/10 sec hot water treatment.