Patent ID: 7872092

Claim:
A polyester resin sheet comprising a polyester resin layer formed by using one or more layers having a number average molecular weight (Mn) of 18500 to 40000 in which at least one or more layers having 5 to 40% by weight of titanium dioxide is formed on the polyester resin layer, wherein a total thickness of the B layer(s) is 9 to 40% of the total thickness of the polyester resin layer, and at least one B layer is placed on the outermost layer, and a light transmittance of the polyester resin sheet at wavelengths of 300 to 350 nm is 0.005 to 10%, a relative reflectance of the polyester resin sheet is 80% or more and 105% or less, an apparent density of the polyester resin sheet is 1.37 to 1.65 g/cm 3 , an optical density is of the polyester resin sheet 0.55 to 3.50, and the variation in optical density of the polyester resin sheet has a fluctuation of within 20% from the center value.