Heat shrinkable film and method for reproducing polyester container using same

A container comprising:

• a polyester container, and
• a heat shrinkable film, which is provided at the polyester container;
• wherein the heat shrinkable film is shrunk by steam or hot air to wrap the outer surface of the polyester container,
• wherein the heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and
• has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds and
• wherein the crystallization temperature of the heat shrinkable film is not measured or is 70° C. to 95° C. by differential scanning calorimetry,
• wherein when a plurality of flakes are thermally treated at a temperature of 200° C. to 220° C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less,
• wherein the flakes are formed by crushing the polyester container and the heat shrinkable film.