BIAXIALLY STRETCHED LAMINATED FILM FOR LAMINATING METAL PANEL

摘要

PURPOSE: To obtain a biaxially stretched laminated film excellent in impact resistance and taste characteristics and suitable for processing by specifying the internal haze per specific length of a laminated film consisting of an A-layer of polyester A based on ethylene terephthalate or ethylene isophthalate with a specific m.p. and a B-layer consisting of polyester B and a thermoplastic elastomer. CONSTITUTION: In a biaxially stretched laminated film for laminating a metal panel consisting of an A-layer composed of polyester A containing ethylene terephthalate or isophthalate with an m.p. of 160-245 deg.C as a main constitutional component and a B-layer wherein polyester B with an m.p. of 140-245 deg.C and a thermoplastic elastomer are compounded, the internal haze per 25μm of the film is 1-75% and the heat shrinkage factor thereof under a 120 deg.C×30-min condition is 5% or less. Since no gap is generated between polyester and the thermoplastic elastomer at the time of stretching when the internal haze of the laminated film is 1-75%, impact resistance is markedly enhanced.