Heat-shrinkable polyester-based film roll

A heat-shrinkable polyester-based film roll, comprising

• a core;
• and
• a heat-shrinkable polyester-based film having a longitudinal direction as a main shrinkage direction that is wound around the core;
• wherein the heat-shrinkable polyester-based film and the heat-shrinkable polyester-based film roll satisfy the following requirements (1) to (4):
• (1) the heat-shrinkable polyester-based film comprises a polyester including ethylene terephthalate as a main constituent component, and at least one polyhydric alcohol selected from a group consisting of 1,4-cyclohexanedimethanol, neopentyl glycol, 1,4-butanediol, diethylene glycol, and 1,3-propanediol;
• (2) all test piece films with a square of 10 cm×10 cm have a heat shrinkage rate in the longitudinal direction of 30% or more and 80% or less by immersion in hot water of 90° C. for 10 seconds followed by immersion in water of 25° C. for 10 seconds, wherein the test piece films are cutout at a center position in a roll width direction, and include
• a first sample that is cutout from a portion provided at a position within 2 m on an inner side of a second end portion provided at an end of the film roll on a winding end side (surface layer side),
• a final sample that is cutout from a portion provided at a position within 2 m on an inner side of a first end portion provided at an end of the film roll on a winding start side (core side), and
• other samples that are cutout from a portion provided every about 100 m from the first sample cutout portion;
• (3) all the test piece films have a heat shrinkage rate in the longitudinal direction of ±3% or less of an average heat shrinkage rate calculated from the heat shrinkage rates in the longitudinal direction measured by the method described in requirement (2);
• and
• (4) the heat-shrinkable polyester-based film comprises fine particles in an amount of 300 to 1200 ppm in the heat-shrinkable polyester-based film.