| 摘要 |
Disclosed is a heat shrinkable polyester film which does not suffer from shrinkage (namely, natural contraction), is suppressed in decrease of the shrinkage ratio in the main shrinkage direction, and is able to be beautifully and efficiently fitted to a container or the like without changing the temperature conditions for thermal shrinkage when the heat shrinkable polyester film is fitted, as a label, to the container or the like by means of thermal shrinkage even after high-temperature summer storage in an outdoor warehouse which has no temperature control system. Specifically disclosed is a heat shrinkable polyester film which is formed from a polyester resin that is mainly composed of ethylene terephthalate and contains 3-12% by mole (inclusive) of one or more monomer components, which can be amorphous components, relative to all the polyester resin components. The heat shrinkable polyester film is characterized in that the shrinkage ratio in 80°C glycerol, the shrinkage ratio in 130°C glycerol and the tensile strength at break in the longitudinal direction are controlled within specific ranges. |
