| 摘要 |
Disclosed is a heat-shrinkable polyester film which, even when stored in an outside warehouse which is not temperature-controlled during a hot summer, does not result in the film shrinking (so-called natural shrinkage); which further has a low decrease in shrinkage rate in the main shrinkage direction, and which can be attached aesthetically and efficiently without changing the temperature conditions for causing heat shrinkage when attaching as a label by heat-shrinking the same to a container (e.g., a plastic bottle). The disclosed heat-shrinkable polyester film comprises a polyester resin having ethylene terephthalate as a main component and containing at least 7 mol% of at least one monomer capable of forming an amorphous component in the whole component of polyester resin. In the heat-shrinkable polyester film, the 80°C -120°C glycerin shrinkage, the natural shrinkage rate after high temperature aging, and the number of initial break age after high-temperature aging are adjusted within a specific range. |
