Patent ID: 7122617
Filing Date: 2006-10-17
Classification: B29C,C08G,C08J,C09K,G02F,Y10T

Abstract:
1. A method of producing a film formed of a polybenzazole precursor, the polybenzazole precursor having a repeating unit shown by the following chemical formula (1) or (2), wherein X is any one selected from the group consisting of a sulfur atom, an oxygen atom, and an imino group; Ar preparing a liquid containing the polybenzazole precursor, the concentration of the polybenzazole precursor in the liquid being 2–30% by weight; spreading the liquid in the form of a film; applying a magnetic or electric field to the spread liquid in such a manner that the polybenzazole precursor in the spread liquid is oriented along a direction of the magnetic or electric field; and solidifying the spread liquid after the application of the magnetic or electric field.