patent number 4842792
Preparation of a novel polyester fiber, such as a poly(ethylene terephthalate) fiber, having at least one continuous groove wherein the surface of the groove is rougher than the surface outside the groove is accomplished through a drafting process involving surface hydrolysis. The fibers have improved cover, softness, and wetting characteristics.
Eastman Kodak Company (Rochester, NY)
8/115.69, 8/DIG.4, 264/136, 264/151, 264/157, 264/168, 264/177.13, 264/177.18, 264/177.19, 264/210.3, 264/210.8, 264/288.8, 264/289.3, 264/290.5