| abstract |
Disclosed is a heat-shrinkable polyester film having a slow shrinkage rate and a moderate shrinkage rate that increases with increasing temperature, a large shrinkage stress, and excellent shrinkage finish. A polarization ratio of ATR-FTIR method in absorbance A2 at absorbance A1 and 1410 cm -1 in 1340 cm -1 of the heat-shrinkable polyester film was measured A1 / A2 is in the film main shrinking direction 0.65 0.9 or less, 0.45 or more and 0.75 or less in the direction perpendicular to the main shrinkage direction, and the hot water heat shrinkage rate when the film is immersed in hot water at 90 ° C. for 10 seconds is 40 in the film main shrinkage direction. % To 60%, and a heat shrinkable polyester film characterized by being 0% or more and 12% or less in a direction orthogonal to the main shrinkage direction. [Selection] Figure 2 |