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Abstract

A heat-shrinkable polyester film includes a polyester resin made from a dicarboxylic component including at least one of terephthalic acid and dimethyl terephthalate, and a diol component including ethylene glycol, 2-methyl-1,3-propanediol, and a diol selected from neopentyl glycol, 1,4-cyclohexanedimethanol, and a combination thereof. Based on 100 mol % of the diol component, the ethylene glycol, the diol mixture and the 2-methyl-1,3-propanediol are present in amounts ranging from 74 mol % to 82 mol %, from 18 mol % to 26 mol %, and from 3.5 mol % to 22 mol %, respectively. The heat-shrinkable polyester film has, after immersion in hot water at 95° C. for 10 seconds, a heat shrinkage in a direction transverse to a machine direction (TD) of greater than 48%, a heat shrinkage in the machine direction of less than 5%, an intrinsic viscosity of greater than 0.5 dL/g, and a yield strength in the TD ranging from 7.5 MPa to 13 MPa.

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First Claim