| 摘要 |
PURPOSE:To provide a polyester film roll capable of being prevented from a stepping slip of edge generated heretofore at the time of transport. CONSTITUTION:In a film roll formed by rolling a biaxially oriented film wherein a layer of polyester A containing particles is laminated to the single surface of a layer of a polyester B so that the layer of polyester A is made inside, the ratio t/d of the thickness (t) of the layer A and the mean particle size (d) contained in the layer A is 0.1-2.5 and the ratio SRmax/SRa of the three- dimensional surface roughness parameter SRa of the layer A and the SRmax thereof is 20 or less. |
