PURPOSE: To produce the composite film having a structure in which a high- polymer material and a liquid crystal material are finely separated in phase and having uniform transmittance.
CONSTITUTION: A coating liquid prepd. by dissolving or dispersing the high- polymer material and the liquid crystal material into a low boiling solvent is applied on a substrate and thereafter, the evaporation of the low boiling solvent in the coated surface is controlled by placing the substrate in the gaseous flow of gaseous nitrogen or is controlled by rotation of the substrate. Simultaneously, the coated surface is smoothed by utilizing the wind force of the gaseous flow or the centrifugal force generated by rotation. to produce the composite film having the uniform transmittance.
KASHIWAGI TORU
HARA KOJI
