| 摘要 |
PROBLEM TO BE SOLVED: To provide a laminated stretched polyester film excellent in molding processability, moistureproofness and handleability. SOLUTION: The laminated stretched polyester film is composed of at least three layers and formed by laminating layers A comprising a polyester and a layer B comprising a thermoplastic elastomer and the outermost layers thereof are the layers A. The laminated film is streched at least uniaxially and the total thickness thereof is 3-3,000μm and a ratio (a/b) of the thickness (a) of the layers A and the thickness (b) of the layer B is 0.01-3. This laminated sheet has Young's modulus of 5-4,000 MPa and a moisture permeability of 150 g/m2 24 hr or more and the center line average roughness (Ra) of either one of the surfaces of the film is 10 nm or more.
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