| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyester film having micro-projections on the surface, excellent drawability and tracability, and high total luminous transmittance and diffused light transmittance, on a conventional polyester film production line with stable quality and at a low cost. SOLUTION: The polyester film contains spherical or convex lens-like particles having an average size of 2 to 50 μm, where the ratio of particles having size of 1 μm or less is 5% or lower, the ratio of particles having size of 100 μm or larger is 1% or lower and is fulfilled the formula 1: 50×(10/ Dav)3<=A<=6000×(10/Dav)3 (where Dav represents average particle size (μm), A represents density of particles on the surface (number/mm2)). |
