Modified grooved polyester fibers and process for production thereof
AssigneeEastman Kodak Company
InventorsShriram Bagrodia, Bobby M. Phillips
Life of this patent
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Abstract
Disclosed is 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. Also disclosed is a drafting process involving surface hydrolysis for the preparation of such fibers. The fibers have improved cover, softness, and wetting characteristics.
Claims18
A fiber comprising a polyester material wherein said fiber has formed therein and extending along the length thereof at least one continuous groove, wherein the mean EB Roughness at the bottom of said groove is about 10% to about 600% higher than the mean EB Roughness outside said groove and the EB Roughness outside said groove is about 0.06.mu. to about 0.20.mu., and wherein said fiber has L.sub.1 /L.sub.2 >1.2, where L.sub.1 and L.sub.2 are the respective major and minor axes of the cross-section.
A fiber comprising poly(ethylene terephthalate) wherein said ailament has formed therein and extending along the length thereof at least one continuous groove, and wherein the cross-section of said fiber has at least one groove such that 0.15.ltoreq.W/H .ltoreq.8.0 and L.sub.1 /L.sub.2 >1.2 where W is width of the groove, H is height of the groove, and L.sub.1 and L.sub.2 are the respective major and minor axes of the cross-section;
- and wherein the fiber surface within said groove has a mean EB Roughness at the bottom of said groove of about 0.11 .mu. to about 0.26 .mu. and the fiber surface outside said groove has a mean EB Roughness of about 0.08 .mu. to about 0.15 .mu., and wherein the mean EB Roughness at the bottom of said groove is a higher value than the mean EB Roughness outside said groove.
Dependencies are inferred from the claim text.