. . . . "U.S. Pat. No. 5,326,848 to Kashimura, et al. discloses thermotropic liquid crystal polyesters produced by a hybrid copolymerization process wherein polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or copolymers of PET and PEN are combined with conventional liquid crystal polyester structural units based on hydroxy naphthoic acid and hydroxy benzoic acid, or unit" . .