| 摘要 |
PROBLEM TO BE SOLVED: To provide a white polyester film containing calcium carbonate particles, which has excellent reflectance and suppresses variation in in-plane reflectance.SOLUTION: The white polyester film comprises a polyester resin and contains calcium carbonate particles. The calcium carbonate particles are included by 31 to 50 mass% in the film, has a 50% volume particle diameter D50 of 0.4 to 2.0 μm, and have D50 (μm) and a BET specific surface area (S: g/m) satisfying a relation of D50≤2.5-0.2×S. |
