| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-shrinkable film optimum in the heat shrink mounting to a bottle having a neck portion from the body portion to the neck portion, from the body portion to the top surface of the cap, from the bottom portion to the neck portion or from the bottom portion to the top surface thereof and reduced in the natural shrinkage factor in the main stretching direction thereof. SOLUTION: A heat-shrinkable film has at least one layer containing a polystyrenic resin and is characterized in that the heat shrinkage factor in the main stretching direction thereof in hot water is 5-22% under a 70 deg.C×10 sec condition and 45% or more under a 80 deg.C×10 sec condition and the natural shrinkage factor in the main stretching direction thereof is 2.5% or less under a 40 deg.C×7 days condition. By this constitution, the generation of wrinkles or pits and abnormality such as shrinkage insufficiency or the like in a body portion, a bottom portion, a neck portion and a top surface is eliminated and beautiful mounting can be obtained. |
