THERMO-SHRINKABLE POLYESTER FILM

摘要

A thermo-shrinkable polyester film is provided to prevent breakage in a rolling process accompanying fixed tension, to increase reliability of products and to secure process stability and productivity. A thermo-shrinkable polyester film has: strength in a direction perpendicular to a main shrinkage direction within initial elongation of 10 %; elongation at break of 50-700 % in a direction perpendicular to the main shrinkage direction; thickness uniformity(DeltaR) of 4 or less; shrinkage of the direction perpendicular to the main shrinkage direction of 5% or less; shrinkage of the main shrinkage direction in 95 °C warm water of 40 % or greater; and elongation at break of the main shrinkage direction of 60-120 %.