Patent ID: 9017782
Filing Date: 2015-04-28
Classification: B29C,B29K,B32B,B65D,C08G,C08J,G09F,Y10T

Abstract:
1. A heat-shrinkable polyester film, having a ratio A1/A2 of an absorbancy A1 at 1340 cm −1 to an absorbancy A2 at 1410 cm −1 obtained when measured by a polarized ATR-FTIR method of not less than 0.65 and not more than 0.9 in the main shrinkage direction of the film and of not less than 0.45 and not more than 0.75 in the direction orthogonal to the main shrinkage direction, and a hot-water heat shrinkage obtained when immersed in hot water at 90° C. for 10 seconds of not less than 40% and not more than 60% in the main shrinkage direction of the film and of not less than 0% and not more than 12% in the direction orthogonal to the main shrinkage direction.