Heat-shrinkable polyester film roll and process for producing the same

A hot contractility and a polyester film reel, and film side of the hot contractility and a polyester film is spiral, the is characterised: aThe thermal contractility and a polyester film of the following basic condition (1) and (2): (1) is approximate are of the sample for cutting the 85℃ lukewarm water is installed 10 seconds primarily and take out of the length direction, then the water 25℃ is installed 10 seconds primarily extractor, and time the maximum contracting shrinkage direction of the whole sample is more than 20%,(2) The film material polymer, with with a secondary a unit among the main a unit; the measuring arranged on the secondary a unit and multiple secondary a unit, a hot material is the unit 100 moles full-automatic % and shaped, complete test specimen's multiple times secondary comprising a content unit is 7 moles % the; and rear calculating the mean values, complete test specimen's multiple times secondary comprising a unit content of the mean value ±2 mole % in range.