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U.S. Patent No. 11,224,546
April 6, 2022
By: Tara Olivo
Eric E. Lennon, Roswell, GA; John H. Conrad, Alpharetta, GA; Douglas J. Hulslander, Stone Mountain, GA; and David W. Hall, Alpharetta, GA. Assigned to Kimberly-Clark Worldwide, Inc., Neenah, WI. Filed: 12/10/15 Issued: 1/18/22 An extruded hollow fiber that generally extends in a longitudinal direction and has an average fiber diameter of from 5 micrometers to 30 micrometers, the hollow fiber comprising a hollow cavity that extends along at least a portion of the fiber in the longitudinal direction and is defined by an interior wall, wherein the interior wall has an average thickness and the product of the average thickness and the average fiber diameter is 110 square micrometers or less and wherein the fiber has a void fraction that is from 5% to 50%.
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