PRODUCTION METHOD OF TRANSPARENT RESIN FILM AND PRODUCTION METHOD OF LAMINATE HAVING TRANSPARENT RESIN FILM

摘要

PROBLEM TO BE SOLVED: To easily wind up a laminate into a roll state and release the wound laminate in the production of the laminate having a transparent resin film comprising a polymer such as polyimide, while maintaining transparency of the transparent resin film.SOLUTION: A production method of a laminate is provided, the laminate having a support body and a transparent resin film comprising at least one polymer selected from polyimide, polyamide imide and polyamide formed on the support body. The method includes: a step of removing a part of a solvent from an applied varnish and forming a transparent resin film containing the residual solvent on the support body to obtain a laminate having the support body and the transparent resin film; and a step of winding up the laminate into a roll state to obtain a roll of the laminate. A part of the solvent is removed from the varnish in such a manner that a weight reduction rate L of the transparent resin film from 120°C to 250°C is over 7% and 40% or less.SELECTED DRAWING: Figure 1