Patent ID: 8648996

Claim:
A method of producing a light-reflecting film having a light-reflecting layer on a resin film and reflecting 30% or more of incident light of a wavelength in the range of 800 to 2000 nm, the method comprising: supplying a starting solution prepared by dissolving a curable liquid crystal compound in a solvent; mixing a chiral agent and the starting solution using an in-line mixing method to form a resultant coating solution, the chiral agent having an HTP of 30 μm −1 or more expressed by HTP=Refractive Index of Curable Liquid Crystal Compound/{Selective Reflection Wavelength (unit: μm) of Cholesteric Liquid Crystal Phase×Ratio of Chiral Agent to Curable Liquid Crystal Compound}; coating the resin film with the resultant coating solution to form a curable liquid crystal composition layer; drying the curable liquid crystal composition layer to form a cholesteric liquid crystal phase; and curing the cholesteric liquid crystal phase to form the light-reflecting layer.