| 摘要 |
PROBLEM TO BE SOLVED: To obtain a molding having selective circularly polarized light reflectivity at a specific wavelength by having the selective reflection maximum of circularly polarized light in a visible light region and specifying the apparent circular dichromatic absolute value by selective reflection to a specific value or above. SOLUTION: The molding comprise various light crystal high polymers (liquid crystal polyester, etc.), and more particularly a cellulose deriv. insofar as a chiral nematic liquid crystal layer may be formed. The molding comprising the cellulose deriv. in such a manner has the selective maximum of the circularly polarized light in a wavelength region of 300 nm and more particularly visible light region. Further, the apparent circular dichromatic absolute value by the selective reflection is >=2,000 m deg.. The process for producing this molding comprises a stage for first constituting the liquid crystal phase by bringing the molding composed of the high polymer capable of forming the liquid crystal phase into contact with solvent vapor and a stage for removing the solvent from the molding after forming the liquid crystal phase. The selective reflective moldings may be efficiently produced by such stages. |
