| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a laminated white polyester film excellent in handling, whiteness, smoothness, cushioning properties, etc. SOLUTION: The laminated film comprising at least three layers including a layer A containing a polyester resin a as a main component, a layer B containing a polyester resin b and a thermoplastic resin d which is incompatible with the resin b as main components, a layer C containing a polyester resin c and a thermoplastic resin e which is incompatible with the resin c as main components meets formulas (1)-(3) in terms of relationships of the thickness and bubble content of each layer. In the formulas of (1) tA>=tB>tC, (2) 70<=tA+tB<=99, and (3) VB>VC>VA, (tA, tB, tC are independently the ratio (%) of the layer A, the layer B, or the layer C to the total thickness; VA, VB, VC are each the bubble content (%) of the layer A, the layer B, or the layer C).</p> |
