| abstract |
【Task】 Transparent laminated film using biaxially stretched polyester film Reducing interference color unevenness during hard coat processing, improving adhesive boiling resistance, and reducing heat-precipitated oligomers during heating while maintaining the advantages of conventional products It is a problem to provide a laminated biaxially stretched polyester film for optics. [Solution] The hard coat after boiling for 1 hour with a ripple amplitude of spectral reflectance at 450 to 600 nm of 2.0% or less after laminating a hard coat with a refractive index of 1.45 to 1.55 on the laminated film (A) Adhesive strength is 90% or more, and the size per area of oligomer particles deposited on the laminated film (A) after heating at 150 ° C. for 60 minutes in a state where no hard coat is laminated on the laminated film (A) is 30 μm in terms of area. A laminated biaxially stretched polyester film for optics that is 2 or less. [Selection figure] None |