US 11,939,704 B2
Water-responsive shape memory wool fiber, fabric and textile comprising thereof, and method for preparing the same
Jinlian Hu, Hong Kong (HK); and Mohammad Irfan Iqbal, Hong Kong (HK)
Assigned to City University of Hong Kong, Hong Kong (HK); and The Hong Kong Polytechnic University, Hong Kong (HK)
Filed by City University of Hong Kong, Hong Kong (HK); and The Hong Kong Polytechnic University, Hong Kong (HK)
Filed on Oct. 18, 2021, as Appl. No. 17/503,401.
Claims priority of provisional application 63/093,365, filed on Oct. 19, 2020.
Prior Publication US 2022/0119990 A1, Apr. 21, 2022
Int. Cl. D02G 1/02 (2006.01); D02G 3/26 (2006.01)
CPC D02G 1/0293 (2013.01) [D02G 3/26 (2013.01); D10B 2211/02 (2013.01); D10B 2401/02 (2013.01); D10B 2401/046 (2013.01); D10B 2501/04 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A knit, water-vapor permeable, water-responsive, shape-memory wool fabric comprising:
a plurality of descaled wool fibers twisted into single yarns at a twisting density of 100 to 600 twists per meter of fibers; and
multi-ply yarns formed from the single yarns and having a twisting frequency of 200 to 700 twists per meter of the single yarns, the multi-ply yarns being steam set to form shape-memory multi-ply yarns;
wherein the shape-memory multi-ply yarns being formed into a first knitting pattern including dynamic pore openings reversibly responsive to an absorbed fabric water content, such that the knit, water-vapor permeable, water-responsive, shape-memory wool fabric has a pore area percentage that reversibly increases from zero percent pore area at zero percent fabric water absorption to approximately 70% pore area at approximately 75 percent fabric water absorption.