| 摘要 |
The present invention addresses the problem of providing a heat-shrinkable polyester film which has a high thermal shrinkage rate in the longitudinal direction and a low thermal shrinkage rate in the transversal direction, and which exhibits excellent shrink finish properties. Provided is a heat-shrinkable polyester film which comprises a polyester having a prescribed composition, and in which the primary shrinkage direction is the longitudinal direction, wherein the heat-shrinkable polyester film satisfies the following requirements: that the difference in reversible heat capacity across the glass transition temperature is 0.15-0.30 J/g·ºC, as measured by temperature modulated DSC; and that the hot water shrinkage rate when the film immersed in hot water at 90°C for 10 seconds is 30-80% in the film longitudinal direction. |
