NOVELTY - White, biaxially stretched film (1) comprises a polyester comprising (a) diol component (80 mole-%) made of at least 1,4-cyclohexanedimethanol, and (b) dicarboxylic acid component (80 mole-%) made of at least one benzene dicarboxylic acid and/or at least one naphthalene dicarboxylic acid. The dicarboxylic acid component is made of (i) a main dicarboxylic acid component (55 mole-%) comprising two dicarboxylic acids (2,6-naphthalenedicarboxylic acid and terephthalic acid) and (ii) a secondary dicarboxylic acid (18 mole-%).    USE - The film is useful for electrical insulation applications, preferably for flat cables in automobiles, cables in seat heaters and as a motor insulation, and for rear insulation in solar modules (all claimed).    ADVANTAGE - The film exhibits improved manufacturability, improved hydrolysis resistance, improved electrical insulating properties and improved mechanical strength.    DETAILED DESCRIPTION - White, biaxially stretched film (1) comprises a polyester comprising (a) diol component (80 mole-%) made of at least 1,4-cyclohexanedimethanol, and (b) dicarboxylic acid component (80 mole-%) made of at least one benzene dicarboxylic acid and/or at least one naphthalene dicarboxylic acid. The dicarboxylic acid component is made from (i) a main dicarboxylic acid component (55 mole-%) comprising two dicarboxylic acid (2,6-naphthalenedicarboxylic acid and terephthalic acid) and (ii) a secondary dicarboxylic acid (18 mole-%), where the secondary-dicarboxylic acid component is different from the main dicarboxylic acid component. An INDEPENDENT CLAIM is also included for producing the film, comprising (A) extruding at least one polymer by a flat die extrusion, (B) removing and quenching for solidification on at least one roll as an amorphous precursor film, (C) reheating the precursor film and stretching biaxially (oriented), and (D) thermo-fixing and rolling the biaxially stretched film.    DESCRIPTION OF DRAWING(S) - The figures 1 and 2 show a schematic representation of the laminate.    Film (1)    Polyester film (2, 3)    Adhesive layer (4, 5)