Patent ID: 11939704
Assignee: CITY UNIVERSITY OF HONG KONG
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 9:
10. A method for preparing a knit, water-vapor permeable, water-responsive, shape-memory wool fabric, comprising:
descaling surface scales of a plurality of wool fibers by chlorination under ultrasound to form the plurality of descaled wool fibers;
combing or carding the plurality of descaled wool fibers after said descaling;
twisting the plurality of descaled wool fibers at a twisting frequency of 100 to 600 twists per meter of the fibers to yield the single yarns;
twisting the single yarns at a twisting frequency of 200 to 700 twists per meter of the single yarns to yield the multi-ply yarns;
setting the multi-ply yarns by steaming followed by drying to form the shape-memory multi-ply yarns;
forming a first knitting pattern into the shape-memory multi-ply yarns to obtain a knit, water-vapor permeable, water-responsive, shape-memory wool fabric, wherein the 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.