| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a film whose thermal shrinkage is suppressed, while suppressing whitening of the film due to oligomer deposition during heat treatment.SOLUTION: A laminated film includes a layer A composed of polyethylene terephthalate having an inherent viscosity of not less than 0.63 dL/g and less than 0.70 dL/g; and a layer B composed of polyethylene terephthalate having an inherent viscosity of not less than 0.50 dL/g and not more than 0.62 dL/g. The layers A and B are laminated in the following order: the layer A, the layer B, and the layer A. A ratio Ta:Tb is 5:5 to 2:8, where Ta is a total thickness of the layer A, and Tb is a total thickness of the layer B.</p> |
