PROBLEM TO BE SOLVED: To provide a thermally shrinkable polyester-based film roll in which the variations of the thermal shrinkage behaviors of the long film wound on the film roll are reduced, and to provide a method for producing the same.;SOLUTION: This film roll produced by winding up the thermally shrinkable polyester-based film is characterized in that the average value of the maximum shrinkage direction thermal shrinkage rates of samples prepared by cutting the thermally shrinkable polyester-based film at an approximately equal distance in the longitudinal direction is ≥75%, when immersing the samples in 85°C hot water for 10 seconds and then pulling up the samples, and the thermal shrinkage rates of all the samples are within a range of ±5 % of the average thermal shrinkage rate.;COPYRIGHT: (C)2005,JPO&NCIPI
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