Shrinkable polyester film.

摘要

A shrinkable polyester film for applying to bottles and other articles comprises not less than 50 mol% of ethylene terephthalate units and has a birefringence of from 0.040 to 0.150, a shrinkage of not less than 40% in one of the machine direction and the transverse direction and a shrinkage of not more than 20% in the other of the said directions after 5 min treatment in an air oven at 100 DEG C, and a heat of fusion of not less than 8.37 kJ/kg (2 cal/g).