| abstract |
[PROBLEMS] To provide a high heat shrinkage ratio in the width direction, a small heat shrinkage ratio in the longitudinal direction, a large mechanical strength in the longitudinal direction, a good perforation openability, and an excellent shrink finish. A heat shrinkable polyester film is provided. [MEANS FOR SOLVING PROBLEMS] (1) Using 1,4-cyclohexanedimethanol as an amorphous monomer in an amount of 5 mol% to 30 mol% in 100 mol% of an alcohol component, and (2) hot water heat shrinkage at 98 ° C. 60% or more and 90% or less, (3) The hot shrinkage rate of hot water at 98 ° C. is −5% or more and 12% or less in the direction perpendicular to the film main shrinkage direction, and (4) Tensile fracture in the direction perpendicular to the film main shrinkage direction The strength is 70 MPa or more and 200 MPa or less, (5) the maximum shrinkage stress in the film main shrinkage direction measured with hot air at 90 ° C. is 2 MPa or more and 10 MPa or less, and the shrinkage stress 30 seconds after the start of measurement is the maximum shrinkage stress. It is a heat-shrinkable polyester film satisfying 60% or more and 100% or less. [Selection] Figure 2 |