Patent ID: 7344765

Claim:
A heat-shrinkable polyester film having a multi-layer structure of at least two layers, among which at least one layer is a layer containing a PET bottle-recycled material, wherein a heat shrinkage percentage of a 10 cm square sample cut out from the film in a maximum shrinkage direction is 40% or higher, under the condition that the square sample is immersed in hot water of 95° C. for 10 seconds and then immersed in water of 25° C. for 10 seconds, and the film contains as polyester components constituting the film, 50% by mole or greater of a terephthalic acid component in 100% by mole of polybasic carboxylic acid components, and the content of an ethylene gilycol component is 50% by mole or greater in 100% by mole of polyhydric alcohol components.