MULTILAYER FILM ROLL, AND METHOD FOR PRODUCING THE MULTILAYER FILM ROLL

摘要

PROBLEM TO BE SOLVED: To obtain a laminated plate obtained by temporarily fixing a polymer film base material for obtaining a satisfactory flexible electronic device.;SOLUTION: A multilayer film obtained by successively winding a polymer film base material layer having a width exceeding 500 mm and a thickness of 12 to 190 μm, a polyimide precursor layer having a thickness of 5 to 200 μm and a thickness variation of 20% or lower, including an organic solvent in a ratio of 20 to 35 mass%, and, preferably, having a reduction viscosity of 0.5 to 5.0 dL/g and a separator film layer having a thickness of 5 to 130 μm around a columnar winding core in a length of 50 m or higher to obtain a multilayer film roll. From the multilayer film roll, a polyimide precursor film is pulled out and is laminated on a glass or the like to obtain a laminated plate.;SELECTED DRAWING: None;COPYRIGHT: (C)2018,JPO&INPIT