Method for orienting a liquid crystalline polymer
AssigneeNippon Oil Co., Ltd.
InventorsYasuyuki Takiguchi, Shigeki Iida, Takehiro Toyooka
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Abstract
A highly orientated, liquid crystalline polymer having a light controlling function and suitable for use in the optoelectronic field is prepared by applying a solution of a polymer which exhibits a thermotropic liquid crystallinity onto a stretched polymer film, drying the applied solution, and thereafter heat-treating the thus-coated film at a temperature at which said liquid crystalline polymer exhibits a liquid crystal phase, for a time sufficient for the molecules of the liquid crystalline polymer to be orientated.
Claims7
A method for orienting a liquid crystalline polymer comprising applying a solution of a polymer which exhibits a thermotropic liquid crystallinity, said polymer being present in said solution in a concentration in the range of between 5% and 50% by weight, onto a stretched polymer film, drying the applied solution, heat-treating the thus-coated film at a temperature at which said liquid crystalline polymer exhibits a liquid crystal phase, for a time sufficient for the molecules of the liquid crystalline polymer to be oriented, and thereafter cooling the coated film to a temperature below the glass transition point of said liquid crystalline polymer.
Dependencies are inferred from the claim text.