Patent ID: 8358468

Claim:
A reflecting sheet including at least a surface layer portion and an inner layer portion, wherein the surface layer portion contains at least 0.3 g/m 2 to 20 g/m 2 of an inorganic powder and a polyolefin resin (C), the inner layer portion contains a polyolefin resin (A) and at least one kind of resins (B) incompatible with the polyolefin resin (A) at temperatures enabling stretching of the polyolefin resin (A), the surface layer portion meets (n 1 −n 2 )/n 2 ≧0.20 (n 1 : refractive index of the inorganic powder, n 2 : refractive index of the polyolefin resin (C)), and the inner layer portion has voids; and an average total reflection index is 90% or more, and assuming that the total reflection index is R 1 in the direction in which the total reflection index is the maximum and that the total reflection index is R 2 in the direction perpendicular to the direction of R 1 , the sheet has anisotropy of the total reflection index of 2.0% or less, the anisotropy being a difference between R 1 and R 2 .