| 摘要 |
PROBLEM TO BE SOLVED: To prepare a heat-shrinkable polyester film which is almost free from defects, such as uneven shrinkage, wrinkles, distortion, and creases, after its heat shrinkage by hot air at the step of shrinking, can have a beautiful shrunk appearance, and is suitably used in full label applications or cap seal applications where a film label requires a high shrinkage depending on the shape of a container. SOLUTION: The heat shrinkage of this film in the main shrinkage direction after treated for 10 sec in 80 deg.C water is 40% or higher, and there are two endotherm peaks obtained by the irreversible heat flux curve at near the glass transition point of the film. |
